Doesn't really sound like a McAfee issue, but rather a indows issue. What version of windows do you have and are you running as 'administrator' or as 'limited user' on your computer? If you right click an .exe file do you see an option 'run as administrator...' listed in the popup menu?
Is your version of Windows up-to-date? You can always check at the Microsoft Update website.
It's Windows XP. I believe this is definately a bug. Taks manager and other system funtions are disabled. I am not able to re-associate .exe extentions to run programs. I get errors indicating RUN32.DLL is not found, etc
Try this tool:
If regedit, taskmanger are still disabled, download this file from kellys-korner:
Save to desktop, then double-click to run.
Thanks -works fine now !!!!!!!!!!!
Glad we could help