Use the System Restore tool to undo the update and then try to
reinstall it. Make sure that no other programs are running while
updating.
"How to Restore the Operating System to a Previous State in Windows
XP" (http://support.microsoft.com/?kbid=306084)
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.