I updated to CFP 3.5, and it no longer shows up in Windows Security Center. I am running Vista SP1 x64.
You can try this.
"At the new Command Prompt window, type “NET STOP WINMGMT /Y” (without the quotes; there must be a space between WINMGMT and /Y) and press Enter.
Then type “exit” end press Enter again.
Go to the folder C:\WINDOWS\system32\wbem and delete the folder “Repository”. Reboot. The Repository folder will be recreated automatically by the Security Center and will now display the correct information."
That didn’t work. I had to uninstall, clean registry (w/ CCleaner), then re-install CIS (download from website).