Cause:

Solution:

1) Click the 'Start' button to display the 'Start' menu.
2) Select 'Programs' and select 'Accessories'.
3) Select 'System Tools' and select 'ScanDisk'. (The 'ScanDisk' dialog box appears.)
4) Select the drive to be scanned from the 'Select the drive(s) you want to check for errors' list box.
5) Select the 'Thorough' radio button in the 'Type of test' group.
6) (Optional) To select additional advanced options:

a) Click 'Advanced...'. (The 'ScanDisk Advanced Options' dialog box appears.)
' ScanDisk Advanced Options' dialog box
b) Select the desired advanced ScanDisk options.
c) Click 'OK'.

7) (Optional) Select the 'Automatically fix errors' check box.
8) Click 'Start'. (ScanDisk checks the files and folders in the selected drive(s).)
9) When finished, click 'Close'.