If you have used a USB disk run the Windows 8 to go! Operating System or perhaps a Vista/Windows 7 OS and now you cannot access it under Windows Vista or 7 even with RMPrepUSB, or even format it under Windows, it may be because the disk has been marked as Read-Only. You may be able to use it in other PCs or notebooks but not your PC. Another test would be to try it on another Operating System.
In this content will show how to remove write protect from USB:
1- Open Start Menu >> Run (or Windows key + R)
2- Type Regedit and press Enter. This will open the registry editor
3- Navigate to the following path:
5- Double click the WriteProtect key in the right pane and set the value to 0 in the Value Data Box
6- Press OK button
7- Exit Registry. Restart your computer and then again re-connect your USB drive on your computer.
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