USB or Universal Serial Bus allows various devices to be connected to computers and laptops. They are plugged in a USB port and devices are connected externally via wires or cables etc.
You might receive a pop-up notification which says that USB device not recognized when you try to plug in a USB device in your port in a computer which has Windows 10 operating system. Something similar to this:
Or in other circumstances the text may vary:
Over all, the message tends to indicate that there may be a problem with your USB port and/or your device.
However, there are many other reasons that maybe causing this problem, and we cannot rely on any one. Listed below are some methods you can use to fix this issue.
Method 1: Restarting your computer
This is probably one of the quickest and straightforward methods. You just have to simply unplug your device, restart your computer and then plug your USB device back and see if the problem resolves. This particular method should be tried first but if this doesn’t work you can follow the other methods listed below.
Method 2: Plug your device in a different computer
If your device works on another computer then you can safely assume that your USB device is not faulty. Then you may follow the other methods mentioned to resolve the issue.
But if it does not work, then your device has probably malfunctioned and you should consider buying a new one.
Method 3: Unplugging other devices
Another reason that this issue occurs is because your computer might be connected to too many USB devices. These might be causing an issue with your device so simply disconnecting and unplugging other devices might just help to resolve this issue.
Method 4: USB Controllers
- Open Device manager by typing ‘msc’ in Run command. Press Windows and R keys together for opening Run command. Then, click once on Universal serial Bus controllers to expand it.
- Search and select USB Root Hub under this category. Right click on it and then select Properties from the options.
- Click on the tab of Power management and un-tick the option of Allow the computer to turn off this device to save power. Proceed with clicking on OK to save the relevant changes.
If you have more than USB root hub, you need to repeat this process with each of them. And make sure to click on OK to save the changes.
When you’re done with this step, plug your USB to see if the device is now working. If it still does not work, click on Allow the computer to turn off this device to save power.
Method 5: The Power Options
- Click on start and open Control Panel. Then select Hardware and Sound from the options and then click on Power options.
- Next, select what the power button does in power options.
- Under the Define power buttons heading, click on change settings that are currently unavailable.
- After that, under shutdown settings, click on to check Turn on fast startup. Proceed by clicking on save changes.
- Finally, restart your computer and plug in your device to check whether it works.
If not, then you must undo all of the changes and try the following method.
Method 6: Scan for hardware changes
- Open Device Manager. Follow the method above on step 1 to open device manager.
- Next, click on Action tab and then select Scan for hardware changes from the options. Microsoft might just be able to help you fix your problem.
Method 6: Disabling USB selective suspend settings
- Click on Start and open Control Panel. Click on View by: small icons and then select Power options.
- Next, under preferred plans click on Change plan settings.
- Select Change advanced power settings.
- Search for and then click on USB settings to expand and then again expand USB selective suspend settings.
- Finally, click Disabled on both Battery and Plugged in settings.
- Click on both OK and Apply to save relevant changes.
Method 7: Driver software update
A popular solution is to simply check if you need a new driver.
The Windows update can help you find one, but sometimes Microsoft may not be able to help with all the drivers that you need. However, you can try these following steps to find the driver with the help of Windows update.
- Search for Device Manager in start and then open it.
- Next, double click on Universal Serial Bus controllers to expand it. Then, right click on the first option, Generic USB Hub and then proceed by clicking on Update Driver software.
- Click on Search automatically for updated driver software. Wait for a few seconds.
Microsoft will update the driver for you automatically.Next click on Scan for hardware changes to see if the unknown USB device is no longer available.If this has not worked, then same process must be applied on must all of the USB drivers to get intended results.
- You must restart your computer after this.
If this method hasn’t work for you, then the device driver may be causing the USB issue. In which case, you should update your device driver too.