Oh dear oh dear, MS at it again.

Accoding to this story: here

SP3 has caused a huge rollout headache including screwing MS’s Point Of Sale application …

See now this is what happens when you FORCE users to have to install SP3 before they can get any more updates ><

Admitedly the users experiancing the problems all using Automatic Update …

So my advise is to grab the complete Network distribution (about 319mb).

Update if you are having problems and are using an AMD machine read this: here