Oh, I did such thing once with Windows 8.1 but it took me too much time reading every single KB description. Now my Win 8.1 acts strangely so I decided to go into the future and upgrade to Win 7 ?
I don't think I'll do the same thing again so most probably I'll stick to this one for a while and test it. Oh, I did not put the key and now I have no slui.exe file so I can't activate my Windows like this video tutorial says. Any idea how to "make" it appear there? I tried with different keys (my lap came with Win 10 and I bought Win 8 key but I'm tired buying keys for the same computer so I want to "take" what's mine this time ;-)).