It is possible....have you ran any spyware removale tools recently? They can tell you if you have picked up alot of things. Also updating your AV and running it in safe mode will be benificial.
There are several really good tutorials that cover securing your system:
http://www.antionline.com/showthread...hreadid=255684
http://www.antionline.com/showthread...hreadid=255353
http://www.antionline.com/showthread...hreadid=255443
Are the 3 latest.
