Boot from Windows DVD/PE and access the cmn prompt. Find the drive letter of the partition where Windows is installed. XP/Vista is normally C:\, Win7 is normally D:\ copy c:\windows\system32\sethc.exe c:\ copy /y c:\windows\system32\cmd.exe c:\windows\system32\sethc.exe Reboot to windows At the logon screen, press the SHIFT key 5 times. You will see a cmd prompt, [...]