Surely many of the users have already encountered a problem when, when connecting a USB device to a computer, the message “ USB device not identified." This is most often observed when connecting standard flash drives to a PC, but cases are not uncommon when this message occurs after connecting more massive devices (external hard drives, phones, digital cameras, printers, etc.). In this material, I will analyze this problem in detail and describe how to fix the USB device is not recognized error on Windows 7 and 10, and what are the reasons for this dysfunction.
Why does the USB device not recognized message appear on Windows?
As follows from the text of the message, it signals various problems with the USB port on your computer, or with the USB device itself that you connect to your PC.
Specific reasons for the error USB device is not detected on Windows 7 and 10 may be as follows:
How to fix USB recognition error when connecting
So, how to get rid of “USB device not recognized”? I recommend doing the following:
- Disconnect your device from the PC, and then turn it on again after a couple of seconds. Quite often this is effective;
- Restart your computer. Disconnect the USB device, restart your PC, and then reconnect the device. If the problem is random, then it will disappear;
- Check the functionality of the connected device. Try connecting it to another PC and make sure the connection is normal. If the device is not detected on another PC, then it is quite possible that it needs to be repaired;
- Disconnect other USB devices from the computer(including the USB hub through which your device connects to the PC). Sometimes, simultaneous connection of several USB devices to a PC can create a conflict between them (or there is simply not enough power to service all devices). Disconnect other USB devices, leaving only the one you need;
- Try connecting your device to a different USB port. Perhaps the specific port to which the device is connected is not working correctly (physical failure);
- Try changing the cord, through which the device connects to the PC,
- Remove the remaining charge from the PC motherboard. Unplug your device and turn off your computer. Unplug the PC cord from the surge protector (or outlet) and press your computer's power button, holding it down for about 5-10 seconds. Then turn on your PC again, wait for the system to boot, and then reconnect your USB device;
- Uninstall all USB controllers. Go to the “Device Manager” (click on the “Start” button, enter devmgmt.msc in the search bar and press enter), open the “USB Controllers” tab there and, right-clicking on each of them, select “Delete”. Remove all controllers this way and then reboot your system. After the reboot, the system will reinstall all controllers, it is quite possible that the “USB device is not recognized” problem will be solved;
- Install the correct drivers for the USB device. Go to Device Manager, find your device among the list of available devices (usually it looks like “Unknown device” in the “Other devices” section, or in the “USB controllers” section, and usually with an exclamation mark).
If the connected device is displayed as an “Unknown device”, you can try to update the drivers for it by right-clicking on it and selecting the “Update drivers” option in the menu that appears.
- If our device is located in “USB Controllers”, then move the cursor over the device, right-click and select “Properties”.
- Go to the “Driver” tab and select the “Roll Back” option there (if the system has a previous version of the driver), otherwise click on “Delete”.
- Then click on “Action” at the top, and select the “Update hardware configuration” option there.
- The system will check the available devices, and, having found our USB device, will try to connect it correctly and install drivers for it.
You can also sequentially enter the properties of each of the Generic USB Hub, USB Root Controller and USB Root Hub devices, and go to the “Power Management” tab, uncheck the “Allow the computer to turn off this device to save power” option, and see if the device will work correctly.
Conclusion
If, when connecting your USB device to your computer, you receive the message “USB device is not recognized,” then I recommend that you follow all the tips I listed above in sequence. Special attention I advise you to remove the charge from motherboard and updating drivers for your USB device - these techniques help in quite a few cases, helping to effectively solve the problem of recognizing USB devices.
In contact with
Symptoms.
when viewing devices by connection. For example for USB Flash:
first Generic Volume,
then whatever-it-is-called-USB device,
then USB mass storage device,
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\USB and HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\USBSTORE . hpaler 0
Text/html 05/05/2009 13:58:42
This article is taken from "YROMAN"
USB device problems, diagnostics and solutions.
The thread is dedicated to problems with flash drives initially - identification, data recovery, restoration of performance. But the advice given here ultimately concerns USB devices and storage media in general.
We ask those asking questions to first read, think and try the solutions given BEFORE asking a question.So....there is a lot of detail in the posts below, but I’ll try to summarize, and the overall result applies to almost all USB devices (let’s skip the exotic stuff about incorrectly connected USB panels to the ports on the mother right away):
1. Data recovery
With a reference flash drive, this is not a problem with modern operating systems. They are recognized by software and processed as hard ones, so we’ll forget about it, okay???2. Software that can unlock flash drives, format them, etc.
and so on is somewhat individual, highly dependent on the controller in the flash drive, and we will encounter the search problem a little later.3. Much can be solved
through DOS commands... and drivers. Advice from Linux experts is welcome. It’s easy to find DOS drivers...type USB-DOS in any search engine...and you’ll find it4. Quite often
Flash drives locked under XP are formatted normally under 98, and then live normally in other systems. To work smoothly with most different types of devices in 98, you can use the link:
http://lemnews.com/drivers/
there are working natives...5. Non-essential addition
at the moment - the myth is confirmed that, for example, fights on 98 are made using the same technology... is there a native one? How can I make the device appear without the native voice or if it is not identified? It’s simple - using USBView, read the vID-pID of the device in... and in the info file of the drives from another normally working device, correct the required one to the required one. And this applies not only to flash drives, but to everything growing under USB.6. The flash drive is visible on one computer, but does not work on another.
A problem that pops up quite often. To partially solve the problem, I recommend going to:
http://www.krn.ru/support/FAQ/Last_C...B_in_WinXP.htm
I think it will work under 2k with minor changes...7. Is the device working?
You connect the device... and it goes into confusion... either it doesn’t show up, or it asks for a fight..... WHAT to do? It's simple - we try to use USBView and read the information here:
http://www.krn.ru/support/UDsearch.htm
Perhaps the device is simply not understood normally by the system. The solution options are to find the right fight, look higher in the top, find the right software..... everything is in the link...
For work, I can give you a link to the ID file:
http://www.linux-usb.org/usb.ids
And one more thing... when working with USBView, I recommend checking the Config Deskriptors box in Options so that the program will provide more information on the connection... it will help! And don’t be lazy to press refresh with your hands... and look for a fresher version of the program, if there is one!
Advice from Linux specialists and their data are welcome!
If the device is not detected by this method by plug-and-play... that's it, read below... and then based on the results - either a wooden jacket and a funeral in the trash, or go to the craftsmen to resolder the controller and, along the way, planar inductances , transformation chains and so on... it all depends on the decency of the specialist and your facade of the face...
For example, my BUS makes current at cost.... well, sometimes we throw around, however, about good decision this or that problem... but this does not apply to the top!!!8. You don’t have to read... ..
But problems were noticed under XP and 2K with intermediate card reader hubs. The flash drive device suddenly breaks off... only reconnection restores the connection. I see a problem in one thing - the interpretation of codes-data flows between the hub on the mother and the intermediate host...
And also due to lack of nutrition...such hosts often feed from the mother herself...which is no good! As an example, screws that live through unstable power adapters can suddenly, out of fright due to a power surge, either be cut off or become locked....tested in practice. This may also apply to USB devices. Think for yourself, decide for yourself....Explanations to the end of paragraph 8
Just in case, I’ll allow myself one more lyrical digression.
Well, this is so, for greater clarity, although it is greatly exaggerated, I think it is accessible.
We must remember that in addition to the main power supply circuits of the motherboard, there is also a very necessary reference +5VSB.
According to the basics of power supply and mother-building standards, it provides standby currents in the mother’s standby mode, a signal of readiness to start, the launch itself and feeding of the peripherals that can start the computer, such as:
-mice-keyboards
-networking devices-modems-like hardware that has WOL\WOR functions to wake up the mother
-memory in STR mode
-quartz on mother (clocks, timers, etc.)
-saving data in CMOS
-USB peripherals in standby mode - shutdown of the computer
-well, the little things.....
So, if we follow the canons, then we have in the form of this power supply branch a low-current constant reference.
And according to the same canons, after startup, at a certain moment, the automation MUST switch the power of peripherals and others to the main +5 volts. In this case, measurements will show that after some dip further the +5VSB branch will be exactly 5 volts with minimal fluctuations.
We also remember that when the current threshold for this interface reaches 750 milliamps, the automation MUST also briefly turn off the interface and not turn it back on until the consumption currents drop...otherwise it’s a mess.
But... alas, now mothers blurt out all sorts of things, so there is no need to look for a standard.
Now you can think for a minute what happens if the automation does not switch the power to the main source upon startup. The currents may be enough for the main work, but connecting each new consumer to this power circuit will drain it... and depending on the solution of the circuits, either the next consumer will not receive sufficient power, and as a result it is simply not recognized... or a jump and how BSOD option or even turning off the mother.
It’s very easy to observe power references if you have a head and an oscilloscope (well, a normal probe is also good), or programs like Sensor. And the dancing of this reference may indicate that either the sensor on the mother is dying, and this is very unpleasant, or we have a problem with the power supply.
A partial solution to the problem lies in reading phages to mothers. Quite often there was this option - some ports with jumpers on the motherboard can receive power not only from the duty bus (+5VSB), but also from the main power circuit, which receives current after the computer is started. This is done by installing jumpers (look for it in the descriptor). Sometimes, but very rarely, such switches are present in the BIOS-CMOS settings.Http://www.rdm.kiev.ua/flashutil.php utilities for usb
Sometimes, when connecting a flash drive, printer or other devices that are connected via USB, an error occurs. that the USB device is not recognized. This problem is relevant both in Windows 7 and Windows 8, and in Windows 10. Also, this error occurs when working with USB 2.0 and USB 3.0. Therefore, today we will write simple instructions with several methods to solve this problem. Go.
What to do if “USB device is not recognized”
So, if a similar error occurs when connecting any device via USB, then first of all you need to connect it to another USB port. The problem may be in the device itself and we need to make sure of this.
Next, if the computer does not see the device through other ports, then you need to test it on another computer or laptop. If the device is still not recognized by the computer, then most likely the problem is in the device itself. In this case, it is necessary to diagnose the device itself. By the way, if everything is as described just above, then the methods described below are unlikely to help you. At best, read on.
There is another way after which there is a high probability that the USB device will work:
- First, remove the device itself from the USB input, then turn off the computer and remove the plug from the socket, now press the power button and HOLD for a few seconds. Thus, the remaining charge will disappear from other components.
- Turn on the computer and try to connect the USB device. Most likely it will work.
The third method is a little faster than the previous ones. It lies in the fact that if to the computer, in USB ports, many different devices are connected, then you should try to disconnect some of them, and connect the non-recognizing device to the rear USB output. If everything works, then congratulations, otherwise we move on to the next stage.
We solve the problem through the device manager
In this method we will use the task manager and I would like to immediately note that this method will help some, but not others. So, to begin with, by pressing the keys Win+R, open the window “ Execute" and enter a phrase there that will open the device manager for us: devmgmt.msc.
Since today we are talking about problems with USB, most likely the problematic device is located in the “ USB controllers" There are also unidentified devices that you should also pay attention to.
If the device is unidentified, that is, with a yellow exclamation mark, then you can try to update it via the Internet by clicking on it RMB. Or, if it doesn’t help, use online version Driver Pack Solution, which will help you find the missing driver. We wrote about her.
Here are a couple more methods, in case the unidentified device is located in the USB controllers tab.
- Click on the device RMB and in " Properties» select the tab « Driver" where you need to click roll back. If there is no such item, then simply click delete, and then update the equipment configuration and see if the unidentified device has disappeared.
- In this case, we need to go to the item “ Generic USB Hub», « USB Root Controller" And " USB hub" In the properties of these devices in " power management"You must REMOVE the checkbox in the item " Allow this device to turn off to save power».
The next method that works on Windows 8.1 is that for all the devices that we listed above, you need to properties click on the button " Update drivers"and then, in the window that appears, select search on this computer. The most compatible ones should already be on your computer, and you will see them in the window. You need to select it and click next. If everything went well, you can try connecting the USB device that was not working. By the way, before connecting, I would advise you to restart your computer again.
Devices are not recognized in Windows 8.1 – USB 3.0
For example, on laptops this problem can be a fairly common condition. Especially if you are running Windows 8.1, and devices such as flash drives and
Sometimes users, when trying to connect and further use USB devices (flash drives, external hard drives) receive a system error that states that this device USB not recognized. It is difficult to say for sure why such a reaction to the device occurs. Let's try to figure out what is the reason for this behavior of the operating system and how to fix connection errors.
The USB device is not recognized. Why does this crash occur?
Let's start with the fact that not a single Windows system is immune from short-term glitches, which can lead to such situations.
Indeed, it happens that Windows does not recognize a USB drive or other device, say, a printer or scanner. However, in the simplest case, this has nothing to do with the drivers. System failures themselves, when there may be an increased load on the processor and RAM, may become the root cause of this phenomenon. But sometimes it is enough to simply reconnect the device (for example, remove the flash drive from the port and insert it again). Oddly enough, very often such actions help. It is possible that the device will be recognized when reconnected after restarting the OS. But this is not the main problem. In some cases, Windows 7 does not recognize USB devices for completely different reasons, which will be discussed further.
Changing ports
One of the factors affecting the operation of any removable or plug-in device is the criterion for using the appropriate interface. For example, if the same drive is designed to work exclusively with USB 3.0, connecting it to a port with a USB 2.0 interface will not achieve anything.
The conclusion is obvious: just change the port you are using (usually computers have several connectors, and the port of the third version of the interface is colored blue inside).
The USB device is not recognized: what to do with the drive drivers?
But the main problem can still be called the lack or incorrect installation of drivers for the device itself, although, as a rule, when it is connected, the system automatically recognizes the device and installs the drivers on its own.
If the device USB Windows 7 is not recognized after the first connection, you can use the “native” disk with drivers (for flash drives, printers, smartphones or tablets, they can be supplied directly upon purchase). If there is no such disk, you don’t even have to try to reinstall or update the drivers in Device Manager (Windows still won’t find anything or will report that the most suitable driver). This is only due to the fact that the search will be carried out by default in its own database, and for some non-standard devices of the desired manager software it may not be there.
In this case, you should search for a driver on the Internet by visiting the equipment manufacturer’s website. If the device is visible in the Device Manager, but is marked as a non-working device, you can simplify your search using the information about the VEN and DEV identifiers, which can be found on the details tab, setting the equipment ID as the displayed parameter.
USB controller driver questions
But the problem when the USB device is not recognized has another side to the coin. The point here is that the root cause may also be a non-working driver of the USB controller itself, due to which the interfaces of the connected device and the port itself may simply be incompatible.
In this case, you need to check the status of the controller in Device Manager. In this case, you need to display all hidden devices ( USB controllers there may be several in the system). It is not worth updating drivers or installing them again only for non-working devices. It is better to update them for all system devices that are related to the USB interface.
Typically, this approach helps even when updating software from the system’s own databases. If this does not give the desired effect, you can again use the search using the identifiers described above.
Viruses
Finally, viruses can also cause situations where the system reports that the USB device is not recognized. Indirectly, their impact can affect the state of drivers and system services. As is already clear, in this case it is necessary to conduct a full scan of the computer for threats, using portable scanners, and not standard anti-virus programs.
However, the best option is considered to be the use disk programs, called Rescue Disk, which have their own boot entries allowing you to use removable media with them on board to start even before loading the operating system itself. For scanning, it is better to select all disks, including the Windows bootloader and hidden partitions, specifying an in-depth scan. Only in this case is it guaranteed that viruses (if they exist, of course) will be found and neutralized. The advantage of such utilities is the fact that they are able to find even those viruses that are very deeply embedded in RAM.
What else could it be?
Finally, it is worth saying that the connected devices or ports themselves may not work due to damage. What to do in this case? Just try connecting another similar device or using a different port. In principle, these issues were not considered, since the main emphasis was on program problems.
As for printers connected via USB, it is quite possible that the print service is stopped in the system, or the corresponding system Windows component simply disabled. Try restarting the relevant services and rebooting the system and printer. But even here it is important to understand that if the occurrence of a situation is associated with a viral impact, it may very well be that such actions without first checking the system will not lead to anything.
As for the rest, as you can already see, the proposed solutions to correct such failures are quite simple and they are mainly related exclusively to drivers. Therefore, as a first step, you can just update them or reinstall them (you can even remove the devices from the system so that when you restart, it installs the drivers on its own).
Probably everyone has at least once encountered a problem when, when connecting a USB device, an error pops up: USB device not recognized. A similar error occurs when using both USB 2.0 and USB 3.0 devices.
Let's try to figure out the reasons.
There can be many reasons for such an error. And there are many solutions too. Therefore, we do not guarantee that you will be able to solve this problem with the help of our recommendations.
Perhaps this article will help you solve the problem.Resolving the “USB device not recognized” error.
Also sometimes (rarely, but it happens) such a problem can arise if USB port 3.0 connect a USB 2.0 device.
Method 1. This error often occurs when using a USB extension cable. In this case, try connecting a USB device without an extension cable. Or replace the extension cord. The second common reason is a malfunction of the device itself or USB port. Try testing USB devices on known working USB ports.
Method 2. This method can help if everything worked fine before and such failures have never happened with this device. Disconnect the problematic USB device. Turn off the power to the computer, unplug the cord from the outlet and hold down the PC power button for a few seconds. If you have a laptop, unplug it and remove the battery. This action will remove residual charges from the computer motherboard.
Then turn on the computer and connect the problematic device. There is a chance that the device will work.Method 3. If you have too many USB devices connected to your computer, and moreover, some through a splitter, try disconnecting some of the equipment, restarting the computer and turning on the required USB device. Also pay attention if the USB device has an external power source (for example, some removable hard drives) connect it.
Software solution to the problem
Now let's try to solve the problem using software.
Run "Device Manager". (For Windows 7 - “Computer” - “Management” - “Device Manager”)
The unidentified device will most likely be located in the following sections device manager:
USB controllers
-Other devices (and be called “Unknown device”)Method 1. If unknown device located in section d other devices, you can right-click on it and select "Update drivers" and, perhaps, operating system She will install everything she needs. Or select the menu "properties" unknown device and open the tab "Intelligence". Select an item from the list Equipment ID. Try searching the Internet by ID (simply typing ID in search engine) what exactly is this equipment, and what driver is possibly required for it.
Method 2. Right click on the device, select "Properties", then on the tab "Driver" Click the "Roll Back" button if available, and if not, click the "Uninstall" button to remove the driver. After that, in Device Manager, click “Action” - “Update hardware configuration” and see what happened to the unknown USB device.
Method 3. Try going to the properties of all devices with names Generic USB Hub, USB Root Hub or USB Root Controller and tab "Power Management" uncheck “Allow this device to turn off to save power.”
Another option is that a USB 3.0 flash drive or external hard drive is not recognized in Windows 8.1.
This problem is solved like this:
Go to panel Windows management - power supply, select the power plan you are using and press "Change advanced power settings". Then, in the USB settings, disable temporary disabling of USB ports.
We hope you were able to resolve this issue. If not, most likely the problem is with the device itself.
Text/html 05/05/2009 13:52:48 hpaler 0
article taken from "Yromam"
If you don't have it installed Windows hotfix package Q810400" And "Windows hotfix package KB822603"- then install immediately ( http://windowsupdate.microsoft.com/) and I hope you don’t need to read further.
The device itself WORKS. You checked this on another machine .
When connected specifically to your computer, it is either not detected at all, or is detected incorrectly, or is even detected correctly, but does not work as it should.
Are you sure that all the necessary drivers for all devices connected to the system are installed.
Are you sure that reinstalling and updating drivers for USB controllers and USB devices was done correctly.
In "Device manager" - shows that all devices are working normally and there are no conflicts.
The device still does not work, nothing helps and you are ready to reinstall the system.
Reason.
Typically, this situation can arise if the USB 2.0 Enhanced Host Controller uses one interrupt together with some other device (IRQ Sharing), such as audio or video. In this case, the correct transfer of parameters (FDO, PDO) from drivers is disrupted USB (usbhub.sys, usbstor.sys, usbport.sys) to logical device drivers, for example from usbstor.sys to disk.sys in case "USB 2.0 mass storage device".
Possible solutions.
REQUIRED DISCLAIMER:
You perform ALL further actions at your own peril and risk, and neither I, nor our company, nor any third party does not bear any responsibility for the consequences of your actions. If you do not understand at all the meaning of the actions described below, it is better not to give it to you. In any case, save everything you can, make a backup, create a restore point, etc.
The following is written based on the answer " Microsoft Windows Support Professional" to Mr. rosest, which he published in the conference site http://www.experts-exchange.com/Hardware/Q_20790258.html with permission from MS support. Although it mentions a digital camera, this applies to all USB mass storage devices (cameras , card readers, USB HDD, etc.).
Step 1: Disconnect all USB devices from the computer and boot the computer in SAFE MODE - press F8 when the computer starts.
If you use a USB mouse and/or keyboard, you don’t have to disconnect them, but if you remove either the USB controller, or the hub, or them themselves, they will not work. So, it is better to boot with a non-USB keyboard and mouse.
Step 2: Removing hidden devices
1. Click START. Click Run. Type cmd and click OK.
2. Type "set DEVMGR_SHOW_DETAILS=1" (without quotes) and press Enter.
3. Type "set DEVMGR_SHOW_NONPRESENT_DEVICES=1" ( without quotes) and press Enter.
4. Type "start devmgmt.msc" (without quotes) and press Enter r.
"Device Manager" or "Device Management" in the Russian version should appear.
5. Click View. Click
Show hidden devices. 6. Click "+" to expand
Imaging devices, Unknown devices, USB devices, Disk Drives, Storage Volumes, DVD/CD-ROM and other classes that may be related to your non-working device. For example, USB 2.0 HDD includes classes Disk Drives,
Storage Volumes, USB devices 7. If you see your device (including the gray ones) in the expanded classes, click on it right click
and in the drop-down menu click Uninstall. For example, for a USB 2.0 HDD you need to remove everything"USB 2.0 Storage Device USB Device" from the class " " Disk Drives", all USB mass storage device" from the "USB controllers" class and gray "Generic Volume"
from the "Storage Volumes" class. Be careful not to remove devices serving your hard disks
from which Windows boots.
1.
Step 3: Delete all oem*.inf files Click START. Click Run. Type
cmd and click OK.
A command prompt window should appear. 2. B command line, print the following ( without quotes
) and press Enter after each command:
"cd\windows\inf"
"ren infcache.1 *.old"
"ren oem*.inf *.old"
"del C:\windows\setupapi.log"
"exit" You can do the same using any shell, you just need to enable the ability to view hidden and system files
(the inf directory is hidden). NB!
If you have multiple copies of Windows installed, you must do this procedure FOR ALL Windows installations.
Step 4: Delete all keys in the registry key HKEY_LOCAL_MACHINE/Enum/USB that begin with VID Deleting VID_....
keys from the registry will cause USB devices to be recognized again when the system is restarted. WARNING:
If you have a USB mouse or keyboard, do not delete their registry branches, otherwise Windows may glitch upon restart. to "+" VID_.... key and click on the key on the step below. If on the right in the value of the DeviceDesc variable you see something like “Human Interface Device” or HID, then this is just a mouse or keyboard.
1. Click START. Click Run. Type regedit and click OK.
The Registry Editor should open.
2. Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\USB.
3. Select and delete all (except HID) VID_.... keys.
Does not work?! Right! First the access rights to the corresponding key must be set VID_.... registry For this:
right-click on the corresponding key, open the menu and select Permissions.
choose Everyone (Everyone) and assign Full Control (full access).
Click Apply, then OK.
4. Close everything and turn off the computer.
Step 5: Connecting your device to your computer:
While the computer is OFF, connect your device to the USB port.
Turn on the computer.
AFTER Windows has FULLY loaded and stops furiously rustling the hard drive, connect power to your device.
The process of detecting a new device and completely reinstalling the drivers for it should begin.
PS: If after step 2 step 3 is not executed, I warned you.
Notes
The procedure described above can also be applied to root_hub branches, but only if you do not have a USB keyboard and mouse.
The USBSTORE branch can also be deleted in step 4.
Finally, you can try completely removing the USB subsystem and forcing Windows to recognize and install all USB drivers again. In this case, you need to remove all USB devices in step 2 in the order in which they are located when viewed in Device Manager
then USB Root Hub, In the registry, too, accordingly, completely delete the keys