Windows 7 deactivation?

Domeen

Distinguished
Sep 11, 2010
17
0
18,510
. My copy of Win 7 was previously installed on my primary PC, which I formated and installed Win 8 on it.

Now I am unable to activate Win 7 on my secondary PC, because the key is said to be invalid. I double checked it for typos and that's not the problem.

Is it possible that I have to somehow deactivate my primary PC Win 7 activation in order to install it on my secondary PC?
 
Solution
Also if it was a retail win 7 version and not OEM -- Was the win 8 install an upgrade ? If so the win 7 activation is now a part of the win 8 license and is not reuseable on another system.