This section is really for introductions only. That particular error is a Windows problem that really belongs in a Windows forum.
Is there some reason you think that it may be McAfee-related? If so please post more information:
What is your operating system, service pack and are you up to date with Microsoft update? There are two ways of checking this. Go to Start/Run and type in winver then click the Enter key. Or, right-click My Computer in the Start Menu or on your desktop (or Computer in Vista) and select Properties.
Post what it says.What McAfee products do you have? Right-click the taskbar icon and select Open SecurityCenter and then click "View Details" or "About" at the lower right of the new window. Post the details from each module.