How to disable removable storage devices such as USB drives

As always – back your system up before messing around in the registry.

Go to Start -> Run -> Type regedit and hit Enter or click on the OK button.
Browse to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
Notice the value ‘Start’


UsbStor Regedit USB
Double click on the ‘Start’ in regedit and the default value data should be 3.

USB Regedit Dword
Switch this value data to 4, and USB storage devices are disabled.
Switch this value data back to 3, and USB storage devices are enabled.