Hi Stan,
System File Checker (Start/Run/CMD/SFC /Scannow)
/SCANNOW
Scans all protected system files immediately.
/SCANONCE
Scans all protected system files at the next boot.
/SCANBOOT
Scans all protected system files at every boot.
/REVERT
Windows XP: Return to default settings.
Sfc sets the following registry value:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Winlogon\SFCScan
Creates a log here:
Start/Run/Msinfo32/Tools/File Signature Verification Utility. Or go to
Start/Run and type in: sigverif. Modify your settings under Advanced. When
the scan is done, go back to Advanced/Logging/View Log.
Another tool for both Current and Older Windows Files: Go to Start/Run and
type in: verifier
Modify the registry for verifier.exe
http://support.microsoft.com/?kbid=244617
--
All the Best,
Kelly (MS-MVP)
Troubleshooting Windows XP
http://www.kellys-korner-xp.com