csmager said:It would be stored on the MS servers. Hence when the new checksum isn't the same as the old one, you fail online activation.
This forces you to ring Microsoft, so as soon as they answer the phone they know without asking you've installed it on a different PC, or you wouldn't've failed activation.
You can only activate the 1st few times online then you have to use the phone anyway or if you don't have the internet so they don't know that you have changed hardware simply because you are ringing them up.
stickroad said:Sorry could you please explain this Checksum to me?
Surely if the Checksum is created when you install O/S on your pc and your hard drive is wiped you wont be able to get that specific info back?
When you 1st activate you send them a checksum of the time and date and the motherboard you have. When you activate the second time the checksum is different in a way other than expected so it doesn't let you activate.
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