Open the Security Center, click on the link near the top labelled ' Using Windows Security Center'; a Help and Support window will open. Scroll down to the bottom and there is a section marked 'See Also'.
Click the link for 'use antivirus software that windows doesn't find' and it will open a guide on how to fix it.

Also, i don't recommend only on one anti-virus program...use also AVG and S&D to keep your computer clean. The AVG will show up under the security center.

Hi

Thanks for your tips. I will try and tell you something

Bye ¡¡