|This has worked for others (I've modified it for Win 8):|
Press Windows key and X key.
Select "Command Prompt (Admin)" from the list - say Yes to prompt.
Type X: in the black box and hit Enter key BUT substitute your pin drive letter for X and don't forget the colon. Check that X:\> is now showing (but your pin drive letter).
If so, type this exactly as written (there are 6 spaces) then hit Enter.
attrib -h -r -s /s /d g:\*.*
See if this helps.
Always pop back and let us know the outcome - thanks
message edited by Derek