What are some of the best free antivirus programs available?

I need a list of some of the best free antivirus software available for download online.

What are some of the best free antivirus programs available?spyware removal

Two highly rated programs:

What are some of the best free antivirus programs available?virus protection software

avast antivirus is a great program which covers all types of malware like spyware, trojans, and viruses
AVG http://free.grisoft.com/
Avira

AVG

Avast
i used to use avg.good program but switched to avast.huge database and auto updates
AVG
Again AVG it is quick it is free and it is excellent. My computer shop recommends it rather than anyof the other you pay for which are expensive and need constant updating.AVG updates itself daily.
AVG hope thishelps you x
I own Spybot and Adaware... both good.

AVG came with my computer and it also seems to be doing its job.