I believe this came about from having to shutdown improperly, but i have the toshiba sattelite 17 in. laptop with windows vista. so when i restarted it came with windows recovery and ask if i wanted to start normally so i did, then it said checking file system on C: the typw of the file system is NTFS. one of your disks needs to be checked for consistency. you may cancel, but i didn't, then it says windows will now check disk, and it will either say corrupt master disk check file or go to analyzing steps 1 of 3. and usually freeze the furthest i've gotten in safe mode is to the home page but it froze and didnt let me log in or switch to user, usually evey thing freezes like that when i get that far, any help would be appreciated!!!