I use my brain.

If you know what you're doing, you will probably never get any viruses or spyware. Don't let other people use your computer.

If you must share the computer, all you really need is Windows Defender.

Stay away from Norton/McAfee Antivirus Internet Security Suite Turbo 5000 or anything like that. All they do is bog down your computer, they're fat bloated software. What you really want in antivirus software is quick definition updates and a very small footprint.

Don't always trust the big name antivirus companies. McAfee recently sent out a DAT update the was bluescreening XP systems.

In the end you can only do so much. Hackers are smarter than you and antivirus companies. If you are not careful, all the antivirus/antimalware software in the world cannot help you. Be smart.

But what do I know, I think the i5 is better than the q6600........