How does Win7 shield U disk to disable USB device

On the Windows 7 system, run the Registry Editor, expand to HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/services/USBSTOR, find and double-click "Start" in the right window, and then modify its default value in the pop-up window. For “4”.

After the modification is completed, the save settings will be exited and will take effect after the next reboot.
After using this method, the USB device in Windows 7 will be disabled. If the user needs to enable the USB device, you must enter the above key values ​​again and change the value back to “3”