Your link is dated 2008 and does not list Win7.
The OP has Win7 and already went through the steps in
Post #14. I think this is an MS issue.
I have the following equipped with my PC:
1. Comodo Firewall 4.1 together with its Defense+ and Sandbox;
2. Malwarebytes' Anti-malware 1.46 (on-demand scanner)'
3. SUPERAntiSpyware Free Edition 4.42.1000 (on-demand scanner);
4. Windows Defender (on-demand scanner).
Everything is being recognized by the Action Center except for the AV, however it is working properly. Therefore the OP will follow up with MS and let us know how things work out.
Thank you for your suggestions.