post #11 of 11
If you're reinstalling windows, I can tell you my experience w/ activation of microsoft products. You can usually activate about twice a year w/o any problems, after that you'll need to call them to get a new activation #.

And if you're just replacing the hard drives, you're allowed to reinstall. So that's no problem. I'm not sure if vista has new activation rules, but the activation rules for other products i've used seems to be if I need to reinstall for the 3rd time within a year, I have to call them about it.