You can always use AVG Free for anti-virus (and it's free!):
http://free.avg.com/
Next thing is dump Internet Explorer - if you are using it - and use Firefox
http://www.mozilla-europe.org/en/firefox/ instead.
If you go into TOOLS-INTERNET OPTIONS and then the PROGRAMS tab in IE, you should be able to MANAGE ADD-ONS. Anything that looks suspicious or useless, either disable or (preferably) delete.
You can also find removal instructions for AV 2009 (which is what it sounds like you have) here:
http://www.bleepingcomputer.com/malw...antivirus-2009