I had to help some regular computer user to clean their computer; one of the user's requests was to "fix" their McAfee, meaning, to update the subscription and solve other "security threats" (not viruses) that McAfee reported. After seeing how indecent this antivirus is, how it uses real intimidation, and is very intrusive with constant pop-ups, we settled on not continuing the subscription and getting rid of it altogether.

I was dealing with MySQL running on a Windows server box with McAfee Active Response running (MarService.exe). It has a feature for tracking files created/deleted, which is accomplished by hashing all new files, saving them to its own local DB, and presumably pushing them to the management server async. The app running on MySQL frequently creates many new tables and fills them as part of SOP, so the disk was constantly hammered by both MySQL and McAfee...