Don't use two different AV programs on the same computer at the same time.
Use one and one only. AVG obveously didn't work for you. Get rid of it and try something better.
I put bitdefender to the test all the time. basicaly looking for virus' at times. You know those malware filled emails? They always go to my spam folder but I like opening them still, don't ask me why, lol.
BD always stops whatever tries to get into the computer. Not once has it let anything in. There was also one time I went to a website which advertised its self as something I was searching for. Well, it was a lot more than that. BD stopped everything which was very persistant.
I did the with Norton on our laptop, Norton didn't catch everything in time and I had to remove some small little things.
hm. Norton just froze up on me just now.... Can't wait till the subscription runs out so I can load BD 2009