Greeting's

The most important thing here is to know if you system is patched. It doesnt matter if you have an anti-virus or firewall you system can still be hacked into if you dont patch it. Go to windows update and update it now. ONLY HAVING SERVICE PACK 2 WILL NOT HELP PROTECT YOUR SYSTEM

Second thing if your system is patched, then do you use admin account to surf the net ? If yes, then its bad. you must never use the administrator account, if you must then use it with DropMyRights

Get more information here :

http://msdn.microsoft.com/security/s...re11152004.asp

http://msdn.microsoft.com/security/s...re01182005.asp

Anyway get an online scan done at housecall or even at microsoft. Remember to disable system restore before you do this.