Been using AVG since antivirus software became a must. Never had any problems. It has also auto infiltrated itself into my MS Outlook when I switched over from Outlook express. Some time afterwards, I became targeted in that e-mails suddenly appeared and mysteriously then disappeared from my inbox. I soon found them suitably de-virused (netsky worm) in Outlook's AVG Virus vault. The actual virus was in AVG's own virus vault. I used to get two of these a day but after a couple of months it has now stopped.
Thanks Grisoft!
P.P.