Windows 10: Reusing windows retail key does not work

I have tried to reuse retail key, which I have previously saved into a text file, on another machine, but I got an error. The old PC that had the license originally on it is broken and its harddrive was formatted. It was not linked to my Microsoft account, so I am stuck. Any advice in how to be able to use the retail product key again?

:)

 

windows 7 key reuse

I'm asking the second thing, if I can reuse my windows 7 key on another machine without any problems. (sorry, I see I forgot to mention it in the original post ^^)

 

Reusing windows 10 retail product key from broken pc

Soon after windows 8 first came out I downloaded it and purchased the product key which I used to upgrade from windows XP. There was a special offer at the time which meant it cost only about £15.00 but it is a genuine retail key not OEM. I later upgraded
to windows 10 using that product key. After some months the computer, which was really quite old, broke down completely. I now have a new windows 10 computer. However this only has windows 10 home installed and the key for the old computer is the pro version.
I have read that you can deactivate a product key on one machine and reuse it on a new one. However, as the old computer does not work I cannot do this. Is there any other way to deactivate and reuse the old product key on my new computer?

 

Reuse key

Good evening (morning night or whatever).

I want to upgrade my old vista PC to windows 10 (but as a fresh install) and I am wondering if I will be able to reuse my vista ultimate key (retail box copy).