The specific error you encountered, 0036, means that IDCRL failed to install. This is apparently a supporting prerequisite for OneCare, but I don't know how it is used. The 0029 is a roll-back error and can be ignored.
Is this 2.0 beta or 1.6? I recommend contacting support.
Support for 2.0 Beta - http://help.live.com/help.aspx?project=onecarev2 - use the "Get More Help" link in the lower right of the page to contact support via email.
Please file a bug on Connect: https://connect.microsoft.com/site/sitehome.aspx?SiteID=168
See the Bug Submission Guide - http://connect.microsoft.com/content/content.aspx?ContentID=3480&SiteID=168 - for details on how to create and submit the Support Log zip file with your bug.
Support for v1.6 is via the information here - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=1183038&SiteID=2
-steve
