I updated McAfee on some of the computers here, installed it on some others. And as soon as it was done installing, I got the "this program has produced an error and will be closed by Windows (or something like that)" error screen. All programs seemed to stop responding too, until I removed McAfee.

This happened on all but one computer, which works perfectly. I only installed it on 4 computers. Kinda gave up when they stopped working.

Anyone had anything similar?