Problem with windows Security and Windows Defender

Windows Security Center say that there is no Malware Detection software installed. This includes Windows Defender and AVG. Windows Security Center say that Windows Defender needs to be turned on ( to turn on click here ) When I click turn on, it starts searching for Defender Updates... Then says there are no Updates for WD and goes back to saying that Windows Defender needs to be turned on.
Windows Security Center also says there is no Anti-Virus. But AVG is installed and completely up to date also.

This all started occuring a few days ago... maybe 7 days ago. Uninstall/ Reinstall of AVG causes no change, checking for updates for Windows Defender thru Windows Update does not fix any problems either.

I previously have found of someone who discribed system restore and then installing the updates to office 2007 sp1, etc, afterward. This is unacceptable. It is quite obvious that this has something to do with registry of the Windows Security Center. If someone knows how to fix this problem with a simple registry edit, I would truely appreciate the help.

Thanks,
King Crabber