HOW TO DISABLE WRITE ACCESS TO USB DRIVES (READ-ONLY ACCESS):

* Click Start then Run
* Type regedit and press enter
* Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
* Create a New Key named as StorageDevicePolicies.
* Highlight StorageDevicePolicies, and then create a New DWORD (32-bit) Value named as WriteProtect.
* Double click on WriteProtect, and set its value data to 1.