I’ve activated hundreds of copies of Office 2010.  Ok, maybe about 60.  But they’ve all worked.  Recently though, they’ve started to fail with a stupid bizarre message – “error 0x80070190 – try again later”.  Well, thanks.

The short answer is that this happens after you install SP2, and you have to activate as an elevated user, not simply a user with admin privileges.  Easy when you know how.  See this video for the full step-by-step instructions (click the ‘Full screen’ icon in the bottom right corner…).