Sometimes, when you connect a USB device to a computer running Windows 10, Windows 8, or Windows 7, a USB device not recognized pop-up message may appear .If your USB device is not detected, then this post will show you how you can fix the problem. You can follow these suggested solutions in any order you think is appropriate for your version of Windows.
How To Fix USB device is not recognized
On a Windows 10 computer, you may see the following message:
The last USB device connected to this computer is faulty and Windows does not recognize it. Try reconnecting your device. If Windows still doesn’t recognize it, your device might not function properly.
1] A simple restart of your Windows computer can sometimes fix this problem. Unplug USB, restart your computer, plug it in and see if it works now. If not, turn off your computer, wait a few minutes, and then turn on your computer again.
2] To avoid possible conflict between two connected USB devices, disconnect other USB devices, connect this one and see if that helps.
3] Run devmgmt.msc to open the device manager. On the Action tab, select Scan for hardware changes and see if that helps.
3] Check if the drivers need to be updated. Open Control Panel> Printers and Devices. Check if there is any entry for Unidentified USB Device or Unknown Device . Open its Properties and update its driver if you find that an update is available.
4] In Device Manager, under USB Root Hub Properties, clear the Allow the computer to turn off this device to save power check box . See if this helps. If not, check again.
5] Run the Hardware and Device Troubleshooter or Windows USB Troubleshooter and see if that helps. Automated tools check the hardware or USB connection connected to the computer for known issues and fix them automatically.
6] If you are using Windows 8, Windows 8.1, Windows Server 2012 R2, or Windows Server 2012, there is a specific issue that affects this version of Windows. This can happen if your USB port is disabled after you safely remove the device from the port. Download and request a hotfix from KB2830154 if you are experiencing this issue.
7] If your USB 3.0 device is not recognized, see this post on an external USB 3.0 hard drive not recognized by Windows. Also see this post USB devices don’t work on Windows.
8] This post will help you if your external hard drive is not detected.
Hope something helps.