SP3 fails to install is it AVG's fault??

I tried to install sp3 on my XP system and got, "Access Denied". MS knowledge base says to turn off any anti-virus s/w and try to re-install. I just fired Norton, and I am new to AVG (free), but I don't see any controls on AVG. How can I disable AVG so I can install sp3?

 

i just right clicked on avg and clicked on exit ,i also did that with my firewall to install sp3. hope you used the norton tool to remove it .