McAfee is a resource goblin... On every computer Ive had it causes lag time, even on one's ive optimized. It's my personal preference, but I use Mozilla Firefox as my browser (it does not store personal info and scans any attachments) along with Kaspersky Internet Suite. It is one of the top rated anti virus programs, and is a one stop deal. No need for running multiple programs. It's fast, effective and even has a couple of features that others dont. Not to mention it's easy on the resources and won't slow your computer.

Last year I had a desktop that got infected, and it got so bad it shut my hard drive down. The computer wouldn't even turn on. Now your computer may not be worth repairing, but perhaps you have some valuable files on it, so they( computer repair shop) can actually extract files onto a disk for you, or even a new computer or external hardrive. Then you can buy another one and protect it from the start. Kaspersky is the way to go. It's on our work computers in all four stores and every employees personal computers at home