Can you rank the best to worst antivirus and antispyware software for PC? Thanks!

ANSWER: Best to worst? Ok this is what i get from my experience…
Anti-virus
The best - NOD32 2.7
Kaspersky Anti-Virus 6.0
Trend Micro Antivirus 2007
ZoneAlarm Internet Security Suite 7.0
AOL Active Virus Shield
CA Internet Security Suite 2007
Avast! Free Edition
AVG Antivirus Free Edition
The Worst - Norton AntiVirus 2007 Anti-spy Software
The best - Spy Sweeper
CounterSpy
Trend Micro Anti-Spyware
Spyware Doctor
Ad-aware SE Pro
Spyware BeGone
McAfee AntiSpyware
Spyware Terminator
The worst - Spyware Killa)

Source: Yahoo Answers

I have a computer running Windows Server 2003. I would like to put some sort of antivirus software on it, but I was just wondering what good antivirus software is available for Windows Server.

ANSWER: Bit Defender 9 Internet Security is the best antivirus solution. My main hobby is antivirus testing and I have proved that Bit Defender is the best antivirus. There are both free and paid versions of Bit Defender. It is a award winning antivirus product. It is very easy to update because the size of updates are less and new virus signatures are released every half an hour.)

Source: Yahoo Answers