Hello, Helen.
This is a peer to peer forum, meaning customers helping customers - it isn't real time chat. I won't be back here again until tomorrow some time, though others may stop in.
The replies you see are your own.
When you say that you reinstalled, did you restore it to the factory state or install Windows on top of itself?
This error can be due to a conflict with Windows Defender or other security software or a broken OneCare installation left in place.
Try running this:
Cleanup tool - http://social.microsoft.com/forums/en-US/onecareinstallandactivate/thread/399071e2-49dc-4767-932d-d261e3965943/
Also see this article for some steps to try: http://support.microsoft.com/kb/930162
And this: http://help.live.com/help.aspx?project=onecarev1_5dogfood&market=en-us&querytype=topic&query=onecare_trou_error_0020.htm
If that doesn't help, and you still can't get OneCare installed, please contact support:
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
-steve
~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~
