Press F8 at bootup, get to the Advanced Boot Menu. Choose Safe Mode, does that work? Do A System Restore. If not,
Boot off of the Windows Disc Or download the
Recovery Console ISO. Burn it to CD with
IMGBurn Boot off of the CD and get to the
Recovery Console. Here type
chkdsk /R and press enter. The Check Disk utility will try and fix any file errors.
You can also download the ISO image for
Seatools or
Drive Fitness in my signature and burn the image to a CD using
IMGBurn also in my signature and boot off of the newly created CD and run the
Quick and
Advanced tests on the HDD to test the integrity of the drive.