What are some good FREE virus/spyware/adware protection softwares?

I have Ad-Aware and Spybot seek and destroy. They work well, but my computer still runs pretty slow, like it's got some viruses or something else going on.... Can't afford to buy any programs. :(

What are some good FREE virus/spyware/adware protection softwares?kawasaki

1.Anti-virus %26gt;

AVG: http://free.grisoft.com/doc/5390/lng/us/...

Avast: http://avast.com/eng/download-avast-home...

AntiVir: http://www.free-av.com/down/windows/anti...

AOL Active Virus Shield :http://www.activevirusshield.com/antivir...

2.Spyware/Adware Protection %26gt; (AdAware and SpyBot are very good)

Spyware Terminator: http://www.spywareterminator.com/

Windows Defender (only for genuine Windows XP): http://www.microsoft.com/downloads/detai...

Super Anti-Spyware Free Edition: http://www.download.com/superantispyware...

3.Firewall %26gt;

Comodo Personal Firewall: http://www.personalfirewall.comodo.com/

ZoneAlarm: http://www.majorgeeks.com/ZoneAlarm_Free...

You may also require temporary files and other trash cleaners. Get both these freeware, and run them(both 'Cleaner' and 'Issues' section of CCleaner) to remove all crap.

CCleaner (9): http://www.ccleaner.com/

Disk Cleaner (7.5): http://www.diskcleaner.nl/download.php

PCSleek Free Error Cleaner: http://www.pcsleek.com/