What is a good anti-virus for Windows XP? 10 points fast!?

I just made a clean install of Windows to my sister's computer because she had a virus problem. Now that she is virus-free, what good free [full] version of anti-virus software can I download other than SUPERAntiSpyware?

Thanks!

Menudo

What is a good anti-virus for Windows XP? 10 points fast!?suzuki

One big problem there is no "good free [full] version" all of the free versions only provide basic protection not full.

The use of any free anti-virus or anti-spyware program as your primary protection is extremely unwise as they lack what is needed for full protection.

Example: AVG openly admits the free version only provides basic protection (see for yourself here: http://free.grisoft.com/ )

SUPERAntiSpyware: is not a anti-virus program it's anti-spyware only and it also lacks any active or realtime protection unless you buy the full version.

Don't be fooled into thinking you're fully protected by any of these free programs because you're not.

Also it is unwise to use more than one anti-virus program as it causes conflicts.

However it is ok to use more than one anti-spyware program as they tend not to conflict.

What is a good anti-virus for Windows XP? 10 points fast!?virus

I use McAfee, not a problem in 3 years!!
I do not recommend any of the free products like AVG, as they are often buggy, and slow performance wise. For less than $50 you can get a professional, feature-rich program like Norton. A computer is like an automobile in that it needs regular maintenance, and Anti-spyware and Anti-virus programs provide you with this. I have a couple of recommendation's for you. Use the links at the end of this post for good starting places.