Many older virus scanners & firewalls need to be updated (usually via a free download, for companies that have made patches available) in order to properly report to the new Windows security center.
That, in & of itself, poses no threat whatsoever to your computer.
The Windows firewall, properly configured if necessary, works very well for what it's intended to do. If you don't like it, it takes about 5 seconds to disable it.
The new Internet Explorer popup blocker will not block non-IE-based popups, such as those that are delivered via crapware already installed on your computer.
I will be emailing Microsoft to find out how I can still download security updates without downloading their firewall and virus software.
Microsoft does not publish antivirus software. The way you download Windows updates without installing SP2 is the same way it has always been done.....go to http://windowsupdate.microsoft.com
(just make sure you remove SP2 from the list of updates to be installed).