I know, I know. I promised fun, but this is important.
Get it. Trust me. You need this software. It's one of the standard programs I install on any PC that crosses my path and it's sole purpose is getting rid of malware.
You're thinking that you don't have malware so you don't need it huh? Think again. It's probably sitting pretty right now right under your nose. But get this, there are some malware programs so bad it won't even let you install this or any other software after it. So get this NOW so if that shows up you already have the means to remove said malware. And you update it every couple of weeks!
(BTW, if you don't mind spending a few bucks get the full version. The realtime scanning is a BIG plus.)