Not sure what happened but i noticed my computer getting laggy randomly when coming out of sleep mode to the point I had to restart. The restarting worked for a little while then I got a "boot critical file c:\windows\system32\drivers\ntfs.sys is corrupt". file repair failed error code 0*45d and now i can only get to Startup Repair and it fails every time and I cant get to safe mode with F8. I can get to command prompt but not sure what to do if anything. It wont let me system restore.