I have used my university educational Windows licence (from Microsoft Imagine/Dreamspark: different names for the same thing) on my custom built computer, but now I would like to sell the computer, but I wish I could sell it without my Windows licence. The problem is, Windows is auto activating each time I reinstall it. Even if I remove key with
slmgr /upk command (https://www.google.com/amp/s/www.howtogeek.com/124286/how-to-uninstall-your-windows-product-key-before-you-sell-your-pc/amp/), it is removed but only until I reinstall Windows again.
It is hard to find information about my problem in the Internet, because almost everyone wants something opposite - to have Windows activated after reinstall. Does anyone know what I can do now?