Please do the following
We need to run a system file check.
Go to the Run box on the Start Menu and type in:
sfc /scannow
Press
Enter
More info on this process can be found
here.
Please post back to let me know if that went okay.
Then
We are going to run chkdsk which will verify and repair the file system
Step One: Click
Start, select
Run
Step Two: In the box, type cmd
Step Three: Click
Ok
Step Four: Run the chkdsk utility by typing in the following command:
chkdsk c: /f /r
NOTE: The /f command automatically fixes any errors encountered, the /r command locates bad sectors and recovers readable information.
Step Five: A reboot is normally required for the chkdsk program to lock the disk and run correctly (this is typical on machines that have only one volume), so simply restart the computer and chkdsk will run automatically. When it's finished, (This process can take quite a while depending on the size of your disk, etc.), it will boot back to normal Windows.
On Rebooting the PC you will see the disk being checked.
This process will take, on average, about an hour.