See this post for the KB article to troubleshoot install problems - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=1588602&SiteID=2
If IE isn't your default browser, set it to be the default. Also, in the IE connections settings, under LAN, make sure that "Automatically Detect..." is not checked.
This is not tech support, though we do try t help each other here.
How to reach support (FAQ) - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
-steve