You didn't list the exact version of your McAfee program OR your operating system BUT IF you are using a recent version of McAfee VirusScan 10 or 11 on Windows 2000 or XP, please see the link below and use the MCPR tool to remove any remnants of VS that might remain.

How to uninstall supported McAfee consumer products using the McAfee Consumer Products Removal tool

And once that's done, you might want to do a full search of the registry, using the link below, then delete any other registry remnants that might remain:

Searching the Registry for McAfee VirusScan Files
http://forums.mcafeehelp.com/viewtopic.php?p=229407#229407

Hope this helps.

Grif