On 07 Nov 2013, "William Sommerwerck"
wrote in rec.audio.pro:

Some months back I installed the Microsoft compatibility update
that allows Office 2000 programs to read and write XML files
(.docs, .xlsx, etc). (It works fine, by the way.)

The problem is that the new formats appeared with Office 2007.
Windows Update now thought my Office software was the 2007
version. I started receiving prompts to install security updates
for it.

Common sense told me it wouldn't be a good idea to modify Office
2000 programs with Office 2007 updates. So when updates were
needed, I cleared the checkboxes for these. Unfortunately...

I think you've let a misconception creep in at this point. The "Office
2007" updates are being presented to you to update the compatibility
pack, not your original Office 2000 installation. If Office 2000 is
still eligible for updates, you would still receive those, too.

Yesterday, I accidentally clicked the wrong button, and they were
installed. It was particularly annoying that repeated clicks on
the "Halt the Update!" button had no effect.

I think this is where things went wrong. It sounds to me like you wound
up with half-installed updates.

This isn't to say that updates can't go wrong, but I've accepting
updates for the compatibility pack for years, and the Office 2003 setup
on all the computers I control still work just fine.