system
3
also it will help to disable system restore and then reboot and have avast do a boot time scan
then run an on-line scanner like trend micro
make sure you do what raman said…maybe even spyware blaster too
are you using outhouse …err outlook? Find out how to be safe. See: http://www.tomsterdam.com/insideoe/
Are you using AVG as a backup? I have read that you should have only one AV at a time running.