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…).