The 0044 error typically occurs if part of OneCare from a prior install remains behind. However, since your problem actually involves an infection that was not prevented or removed by your security software before you attempted the install of OneCare, you need to deal with that. It is often impossible to install new security software when the PC is already infected. Try an online scanner first:
http://www.eset.com/onlinescan/
http://www.ewido.net/en/onlinescan/
http://onecare.live.com/site/en-us/default.htm
If you are in North America, you can call 866-727-2338 for help with virus and spyware infections. See http://www.microsoft.com/protect/support/default.mspx for details. For international information, see your local subsidiary Support site.
Once the infection has been resolved, you will need to remove all other security software in order to install OneCare. Before attempting the install again, use the cleanup tool:
http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=828910&SiteID=2
-steve
