I put a new motherboard in my system and now it says my os is being used by another computer.

q_pete

Reputable
May 21, 2014
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4,510
I I put a new motherboard in my system and now it says my os is being used by another computer. I know I need to call in to them and tell them that I just switched the motherboard but how do I find the activation key if I don't have the cd or the sticker?