ChkDsk

ChkDsk is the command to scan a disk for errors and repair.

To schedule a disk check on the next Windows startup, open a command prompt and type the following command: chkdsk /f

If you are not able to start Windows, you may need to use the recovery console or a Boot CD.

ChkDsk: Recovery console
To start the recovery console, hold down F8 after the boot logo for your computer appears. Select Recovery Console using the arrow keys and hit Enter.

If you did not set an Administrator password, hit Enter when it asks for a password.

At the C:\ prompt type: chkdsk /p

After the program finishes, type: exit

Windows should now start normally.

ChkDsk: Boot CD
After creating a Boot CD, start your computer with the CD. Some computers require you to hold down F12 to choose a device to start from.

When the desktop loads, click the Start menu then Command prompt (need verification).

At the command prompt type: chkdsk /f

When the program finishes, restart normally.