To DISABLE the access to USB port, in Windows OS follow the below steps ****** 1. Click Start, and then click Run. 2. In the Open box, type regedit, and then click OK. 3. Locate the following in the Left side menu under "Computer", HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTORE 4. Search for "start" register key in the right side bar and double-click on it. 5. In the Value data field type 4( Before it can be 3),further click Hexadecimal (if it is not already selected), and then click OK. 6. Quit Registry Editor. Now Your USB drive is disabled and no one can use it To RE- ENABLE a disabled port: ***** 1. Click Start, and then click Run. 2. In the Open box, type regedit, and then click OK. 3. Locate the following in the Left side menu under "Computer", HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTORE 4. Search for "start" register key in the right side bar and ...