[Al Skierkiewicz]

Eric,
In doing some research there is a variety of known virus problems that disguise themselves as this Windows security file. If you can get the options screen and can select DOS instead of Windows or Safe mode. The file should be in the C:\Windows\System32 folder. Check the date and size of this file and any other file os a similar name and/or size with a date about the time of your problem. It is possible that the virus has renamed your origianl file and substituted it's own. Simply deleting the file will not fix the problem as so many Windows processes use this file.