How to disable or enable USB port or device

A. Click on Start –> Run –> regedit

B. Search for the key “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor”

C. Select the key UsbStor, double clicks on Start value.

D. In “Value data” enter 4 to disable USB storage, or enter 3 to enable USB storage on windows system