Windows 10: Unable to re-activate windows

A few years ago, I bought a computer with pre-installed windows. The license was linked to my Microsoft account, and when I got a new motherboard last year, I was able to use the same license with that motherboard. I just bought a new one again, but now I cannot re-activate my license, as my current device does not show under my devices in the troubleshooter.I read something about not having the rights to re-activate pre-installed windows??? So how come I was able to do it already? I could've saved myself the money of buying the motherboard right now had I known about this........

:)

 

Unable to Activate Win 8

I was about to suggest run CMD as Admin and then do a "slmgr -ipk xxxx-xxxx-xxxx-xxxx" activation...does anyone know if that works with win8?

 

Unable to Activate Win 8

I got Win 8 isntalled on my file server, but I am unable to activate it with the key. Says the key is invalid. Since I work at microsoft I got a retail version from the employee store. I have been doing some reading, and to be able to activate Win8 with the key there needs to be a previous version of Windows installed for it to work. WTF, so you can't do clean installs?

And the box says nothing about Upgrade version. Straight Windows 8 Pro.

 

windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx