Have you tried running without both Windows Defender and your antivirus?
Are you behind a router? I think it is quite possible that this is a
networking issue, and unrelated to either Windows Defender or the antivirus.
--
"asphaltsally" <asphaltsally@discussions.microsoft.com> wrote in message
news:E473B8F9-FF05-4036-9945-0988D6877CAB@microsoft.com...
> I'm running Windows XP and Vista on two seperate partitions on the same
> computer. I have cable internet and am connected by ethernet wire. I
> have
> no connectivity problems whatsover with XP. When I'm running Vista, I
> always
> get the "Your computer might be at risk" warning and when I go to the
> security center it says that I don't have antivirus software and my
> windows
> defender is not turned on. I do have avast and it is up to date. When I
> open windows defender it says it is running and up to date. THEN I get
> kicked offline and can't get back on again, even in XP without totally
> unhooking and unplugging and reinstalling all my cables and wires! What
> the
> hey! I have screenshots of the warnings, etc. I am talking about but do
> not
> see how to attach them to this post.