Mid-October and it just appeared on one of our computers. Read through the comments and just got off the phone with MS support. Bottom line, I'm not downloading it. Opened Word and disabled updates, based on MS support advice. That computer is current with
it's Windows updates.
From MS support phone call:
Manufacturers of computers installed Starter 2010 on computers as a "trial basis" if the computer being sold didn't have full Word. The length of the trial basis just depends on what the manufacturer arranged/installed. The pop-up is from an unnamed third-party
associated with this manufacturer/trial basis arrangement. It doesn't seem to matter who the manufacturer is. It seems the third party has been told exactly who to send this pop-up to.
Not really sure and don't care too much what this "update" is about. MS is well aware of the situation. OK, maybe not in writing about here. But, on the phone they are.