We are all unpaid volunteers here and help where we can but some days we are stretched a bit thin so sorry your post wasn't answered immediately. True Technical Support is available for free via Chat in the link at top left of this page or in my signature.
You don't state what operating system and service pack this is and whether or not you are totally up to date, but I trust you are.
You also don't mention what version of McAfee software you are using. If it';s regular home products that can be obtained by double-clicking the taskbar icon to open SecurityCenter then clicking "About" at the bottom right of the frame.
If you feel that you are clean of whatever malware it was then it would appear that it may be corrupted.
Try the following after having temporarily enabled Windows Firewall for protection.
1. Uninstall all McAfee programs through "Add or Remove Programs" in Windows "Control Panel".
2. Use the MCPR tool, see this article:
How to remove supported McAfee consumer products using the McAfee Consumer Products Removal tool (MC... This will remove all McAfee remnants from your computer. (you must have Windows Vista, XP or 2000 SP4 to use this tool)
3. Launch Windows Explorer and delete all McAfee files in "Program Files" but especially in "C:\Document and Settings\<user>\Application Data" and "C:\Document and Settings\All Users\Application Data". You have to set Windows Explorer to show all hidden files and folders (Tools > Folder Options > View tab). Just delete the McAfee folders even if they are empty in all the "Application Data" folders. Can be more than one!
In Vista: C:\Program Files, C:\ProgramData and C:\Users\yourname\AppData\Roaming
If you can't find these files don't worry. It just means that MCPR has done its job.
4. Reboot and redownload/reinstall your McAfee products directly from your account at the McAfee web site.