AVG Doesn't work

I have to admit. This was my mistake. The virus was not on the network.

My client has AVG Internet Security installed on all 5 computers on his network. Brand new and paid for. 

He has just run full scans.

However even after that some malware on his network is running an SMTP server and using his mail account to send hundreds of thousands of spam messages.

Why hasn't AVG picked this up?


I have to admit. This was my mistake. The virus was not on the network.