Windows Vista "Windows Update" broken?

Today, I wake up, first thing I do is go to the computer, check my email.  Next thing I notice, Windows Update is saying there is a new update available to install. 

Ok, so, I check it out, its a Windows Defender update KB915597. (1.14.1923.4).  Ok, fine, I install it.  Few minutes later..  Another windows update.  Again, its the same one I just installed. I figure what the heck. So, again, I let it update.  I go and do my thing in the bathroom.. I come back, and I see yet again another Windows Update for the same thing.  Now I'm starting to wonder.. what the heck is going on.  Why the repeated updates?  Doesn't Windows Update know whats already on my machine?

I try and figure out what I had done in the past that might lead to this problem and then I remember something.  Last night, I disabled the firewall and windows defender and a whole slew of things not really needed.  Ok well Windows defender is one of the ones I should keep up..  But this brings the question to mind.  If a service is "Disabled" in Windows Vista, does this mean, any updates that are available to install for these disabled services will keep coming up in Windows Updates repeatedly?    I've already so far allowed it to install 3 times.  Same version number (1.14.1923.4).  Each time it installs successfully too.

I'm going to try something.  Enabling Windows Defender and then allowing the update to happen.

[PAUSE while enabling Windows Defender and updating it.]

Ok, now its enabled and updated..  Checking for more updates..

[PAUSE]

Ah hah.  No new updates. Weird.  So, maybe can anyone here enlighten me to as why this happens or if its already been posted out there some where on the internet provide a link?