Fun with Antivirus Software

Something upset my antivirus software the other day... so, after a quick reinstallation I am now having fun with antivirus software.

I am running:
Grisoft AVG
SpyBot Search and Destroy
Lavasoft Ad Aware
Windows Defender
and Windows Firewall

Just for extra fun this evening I am trying out Windows Live OneCare. Although I am not sure about it. Why does it cost $49? All the software I listed above is free. Does Microsoft need my money? Wouldn't it be nice if Windows included this in the OS?

I'm also not sure why it orders things the way it does. It does a disk cleanup and disk fragmentation scan before checking for open ports. I would have thought it better to check the ports before worrying about fragmentation...