look guys i had same problem what i did was
(Go to Start --> Run, then type Regedit
2. Navigate to the registry folder HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
3. Find a key called CheckedValue.
4. Double Click CheckedValue key and modify it to 1. This is to show all the hidden files.)
that should be it guys.. formating wont solve nothing on the begining cauze i tried ti 5 times and every time i get same error so good luck for all :)