Are you using OneCare?
If so, you may want to contact support for help.
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
If not, 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
The problem, however, is that Windows has set the "dirty bit" which tell Windows to run chkdsk at startup due to detected errors on the disk.
This link may help:
http://www.forbiddenpc.com/chkdsk.htm
-steve
Microsoft MVP Windows Live / Windows Live OneCare, Live Mesh, & MS Security Essentials Forums Moderator