Found at Toms Hardware:
Click on ‘Start’ –> ‘Run’ –> type in ‘regedit’ and press enter.
Search for HKEY_LOCAL_MACHINE
Scroll down the list and click on SYSTEM
Click on CurrentControlSet
Click on Policies
Click on Microsoft
Click on FVE
In the panel on the right side, if the values for either FDVDenyWriteAccess OR RDVDenyWriteAccess are anything other than ‘0x00000000 (0)’, right click and then click on ‘Modify’, then enter ‘0’ and press Enter.
Remove the flash drive and reinsert. You can now copy to or write to the flash drive.
Works for Windows 7 Professional SP-1 64-bit
