Here is the procedure First click Start> Run> and bring up a command prompt by typing in "CMD" and then type "fsutil dirty query d:" <drive letter as your requirement C: or whtsoever> but without the quotes. This queries the drive, and more than likely it will tell you that it is dirty. Next, type "CHKNTFS /X D:". The X tells Windows to NOT check that particular drive on the next reboot. At this time, manually reboot your computer, it should not do a Chkdsk and take you directly to Windows. Once Windows has fully loaded, bring up another CMD prompt and now you want to do a Chkdsk manually by typing "Chkdsk /f /r d:". This should take you through 5 stages of the scan and will unset that dirty bit. Finally, type "fsutil dirty query d:" and Windows will confirm that the dirty bit is not set on that drive. Good luck Reference from http://www.pcreview.co.uk/forums/do-clear-dirty-bit-t112220.html