A file critical to system initialization, such as Smss.exe, may be missingor corrupted.
Use one of the following methods to restore a missing or corrupted file:
If the Windows Operating System is installed on a FAT partition, copy the initialization file to the %SystemRoot%\System32 directory.If Windows NT 3.51 or 4.0 is installed on an NTFS partition, reinstall Windows NT to a separate directory. Log on as the same user with the same permissions and copy the initialization file to the %SystemRoot%\System32 directory. If Windows 2000 is installed on an NTFS partition use the Recovery Console to replace system files. For instructions on relacing system files using the recovery console see:
229716 Description of WIndows 2000 Recovery Console