Microsoft is tweaking the antipiracy tech of Windows 7, making it a bit less annoying than in Windows Vista:
In Windows Vista, if a user does not activate their software immediately, they get a warning that they still need to do so. The dialog box offers two options, to activate immediately or to do so later. However, the activate later box cannot be checked for 15 seconds.
Microsoft decided this was a bit too annoying. With Windows 7, users can click activate later immediately, but then get a dialog box touting the benefits of activation.
It's the latest effort by Microsoft to scale back the intrusiveness of its technology while still aiming to deter piracy. With the first service pack to Vista, Microsoft made the software significantly more usable to those whose versions of Windows are determined not to be genuine.