I am trying to install ONE CARE. After step #1, the computer reboots and the error appears. I am not able to enter key number.
You either have a beta version of .Net Framework 2.0 installed or your .Net Framework 2.0 installation is damaged.
See Method 3 in this KB article - http://support.microsoft.com/default.aspx/kb/910656
If that doesn't help, please contact support -
How to reach support (FAQ) - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
-steve