Windows security keeps telling me my anti virus is off how can I make sure it is on?

Hello and Welcome to the Webroot Community!
 
Not knowing which operating system you have I did a Google Search: https://www.google.com/search?q=reset+action+center&ie=utf-8&oe=utf-8&gws_rd=cr&ei=W7VpVrCNEsbZecS3kPAJ and here as well: https://www.google.com/search?q=reset+action+center&ie=utf-8&oe=utf-8&gws_rd=cr&ei=W7VpVrCNEsbZecS3kPAJ#q=reset+Security+center and for Windows 10 see here: http://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings/can-i-reset-or-re-install-the-action-center-in/955d4d0b-dfe2-4034-8579-dd608dd541e4?auth=1
 
Please let us know if you have further questions or if you find a fix for this issue.
 
Thanks,
 
Daniel 😉