Run the hard drive diagnostic first to see if there are any physical problems with the drive. The HD diag will be a .iso file that you use to create a bootable CD from.
If okay, then Click on
Start then
Run, type
chkdsk x: /r and press
Enter.
You may see a message
Quote:
The type of the file system is NTFS.
Chkdsk cannot run because the volume is in use by another
process. Chkdsk may run if this volume is dismounted first.
ALL OPENED HANDLES TO THIS VOLUME WOULD THEN BE INVALID.
Would you like to force a dismount on this volume? (Y/N)
Type
y and press
Enter.
Shutdown and reboot. Chkdsk will start. It can take an hour or more to run depending on the size of your hard drive.
Be patient and let it complete undisturbed.