Are you using Windows Live OneCare and the printer sharing feature of OneCare? If so, please contact support.
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
if not, see this link for your support options:
Windows Update Solution Center - http://support.microsoft.com/ph/6527
or contact the printer manufacturer for help.
If you are not using OneCare, you're off topic for this forum, which is dedicated to Windows Live OneCare. You may want to try the Microsoft Public newsgroups here: http://www.microsoft.com/communities/newsgroups/list/en-us/default.aspx
-steve
Microsoft MVP Windows Live / Windows Live OneCare, Live Mesh, & MS Security Essentials Forums Moderator