USB Disk Manager (Lock & Unlock USB Drive) FREE.

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( When you use this: You ll be able to use the USB to install anything at the USB to your computer, but you Can not do any changes to the programs at it. ) - (you can NOT Delete it or Modify it. ) Neither does any other software Exist at the computer you are working at. As Viruses or malwares . Etc. Main article : http://www.cnet.com/how-to/lock-down-usb-drives-in-windows-with-usb-disk-manager/ Direct ownload: http://download.cnet.com/USB-Disk-Manager/3000-2094_4-75743006.html --------------------------------------------------------------------------- To UNLock the Drive : Regedit: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control StorageDevicePolicies \ Change the DWORD Value (Modify it ) to 0 (To Lock the drive the Value is: 1) ----------------------------------------------------------------------------------------------- Or: CMD ( As Admin ): diskpart list disk select disk x (x is the number of USB drive with which you're getting error and is plugged in, see screenshot below) attributes disk clear readonly