>I have a client using XP with AVG as their anti virus. They keep getting a popup window with a Resident Shield alert stating that they have some sort of virus on their PC.
>
>Is this part of AVG or is this malware?
>
>What's needed to get rid of these popups?

A Resident Shield is the main security process of AVG Anti-Virus. Get rid PC from viruses and AVG will not bother you anymore.