I just answered another post with the exact same situation, so I'm not certain that the 0014 problem, which indicates a download error - usually due to a local issue on your PC - isn't a server side issue.
First of all, you did not need to uninstall the old copy as it was already the latest version unless there was a problem and it hadn't been updating.
When you actually do reinstall, activating with your same subscription LiveID will cause OneCare to inherit your old subscription so you will need to follow the renewal path, which is all you had to do originally.
How to Renew a Subscription to Windows Live OneCare
Who told you to uninstall?
You may want to run the cleanup tool before trying to install once again.
Cleanup tool - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=828910&SiteID=2
See this post for the KB article to troubleshoot install problems - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=1588602&SiteID=2
And, if all else fails, please contact support for help:
How to reach support (FAQ) - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
-steve
