If you are unable to use this captcha for any reason, please contact us by email at support@dreamwidth.org
Other options:
no subject
http://answers.microsoft.com/en-us/windows/forum/windows_xp-windows_update/windows-update-component-must-be-repairednot-fixed/99bd8203-bb97-421a-aedd-8e35eb8e7af7
(I should add here that I'm the kind of person who tends to go to an IT person after having exhausted all self-help, largely because I've often found solutions on my own.)