It looks totally different, much better and the updates (optional ones I haven't installed) now have a "reading pane" at the right with detailed description of update... maybe your PC hasn't done an update check yet today... maybe force one manually.
Tried the regular update and it wasn't found so tried your link. On first go at running it was refused "need to be an administrator", didn't understand that as I am the only user, so downloaded and saved it. Then ran it as an administrator and it worked fine.
It looks good with a lot more update information available.
I have not tried my Vista lappy this morning but did try to access the XP Microsoft Update site via my normal bookmarked link.
"403 ERROR -FORBIDDEN ACCESS DENIED you do not have the credentials to access this information"
Accessed the same page via a fresh Google link and was told that I needed to upgrade my software in order to access the site ... which it then proceeded to do without giving me the chance to say yes or no.
All back to normal now but I have never seen that before.