Hi,
1. Have you made any changes to the computer prior to this issue?
2. When exactly do you receive this error message?
Follow the methods mentioned below and check.
Method 1: Run a virus scan with Microsoft Safety scanner and check.
http://www.microsoft.com/security/scanner/en-us/default.aspx
Note: Before performing the security scan take a backup of important data.
Method 2: Check a drive for errorshttp://windows.microsoft.com/en-US/windows7/Check-a-drive-for-errors
Note: Answer ‘Y’ when chkdsk asks you if you want to check the drive next time Windows boots.
While performing chkdsk on the hard drive if any bad sectors are found on the hard drive, then chkdsk tries to repair that sector if any data available on that might be lost.