I just moved your post from Off Topic to the Firewall topic folder.
Check your PC date and time.
Make sure that you are not running other security software.
Try -
Firewall repair tool - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2468376&SiteID=2
and the
Virus and Spyware repair tool - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2667445&SiteID=2
However, since *both* are failing to start, a reinstall may be the way to go or contact support.
How to reach support (FAQ) - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
-steve