Malware Protection issues in Security Center

Hi,

I'm having some issues with the Malware Protection in Security Center.

First, any of the anti-virus programs I've installed are detected by the
"Security Centre". I am using MacAfee.

Second, I can't turn on Windows Defender in the Security Center. When I try
to activate it, he searches for any available update. Once he detects it is
up to date, a warning message window pops-up and there's no way to turn it
on.

Because of these two issues, I'm continuosly getting alerts from the
Security Center. And I know that both programs are up and running.

Could you help me figuring out as to how to get rid of these Security Center
Alerts.

Cheers

Hello everybody!

Have the exact same problem with the one exception that I'm using Antivir as a virusprotection.

My windowsversion is Windows Vista Business 64.

Thankful for any help since this is driving me crazy.