Vista security center

[martinlw]

Hi,My computer is running Home premium Vista and my son and daughter are running Windows XP on there computers we all three have Virgin Media PC Guard Antivirus installed the security center on windows xp says this is running and is fine on my Vista computer security center says there is no antivirus software to be found any ideas why vista wont recognise Pc Guard Antivirus,also my computer recognises the PC guard firewall really strange.Any ideas to fix this please.