I set up son's new computer and before going on line, I went to programs and clicked on Norton Anti-virus ( Came with free 60 day subscription) it showed uninstall link,i clicked and followed instructions and restarted computer. After going on line for first time, I installed protection package from ATT Yahoo home page.
I have it installed and it shows on and I can do scans, but the Windows Security Center Shows warning (No Malware Program Installed ) .
The ATT Protection shows it on. Why won't Windows Security Center recognize the anti-virus program ?

HP computer,3GB Ram , Vista Home Premium