For Anti-virus use AVG Anti Virus
http://free.grisoft.com/doc/2/
I’m really liking windows defender
http://www.microsoft.com/athome/security/spyware/software/default.mspx
Then there’s Ad-Aware.
http://www.lavasoftusa.com/products/ad_aware_free.php
And Spy bot Search and destroy
http://www.safer-networking.org/en/download/index.html
And if you want to pay for it check out http://www.sunbelt-software.com/
Finally, if you are running Norton Anti-Virus - uninstall it.
If that doesn’t clean everything out, there are some other tricks you can use. Check out cnet.com, they have a pretty good guides.
How old is your computer and what Operating system are you using?
bttt
I’ve done it in an earlier post, but it would be worth adding to your list of valuable software:
http://www.javacoolsoftware.com - Get SpywareBlaster.
It will help protect your computer from infections, but if you use the free version, you will need to do the updates manually. No big deal, just remember to do them.
Mark