The 0044 error indicates an installation failure but I don't know the cause or how to resolve it. You can try using the cleanup tool -
http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/399071e2-49dc-4767-932d-d261e3965943
and then try to install One Care but contacting support might be the best option. How to reach support -
http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
Jim
Microsoft MVP Consumer Security - Forum Moderator - Live One Care - Live Mesh - Microsoft Security Essentials