What should I do if win7 always fails to recognize usb devices?

What should I do if win7 always fails to recognize the USB device? The win7 system is currently a computer system used by most friends, but because it has been around for too long, certain problems have also occurred. Recently, many friends have reported that the USB interface of the win7 system cannot be used. This is most likely because the win7 system cannot recognize the USB device normally. So, how should we solve it? Below, the editor will bring you the win7 cannot recognize USB device solution.

win7 cannot recognize usb device solution

1. Press and hold Win R at the same time to open the run window, enter "devmgmt.msc" and click OK

2. Right-click "Universal Serial Bus Controller", select "Scan for hardware changes", re-plug and unplug the USB device to see if it returns to normal

3. Then open the run window again, enter "regedit" and click OK

4、 Click "Hkey_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Class{4D36E967-E325-11ce-BFC1-08002BE10318}" in sequence, find and delete "UpperFilters" and "LowerFilters", and restart the computer

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