I apology if this was asked already but I cannot find related question.
So thing is I have legal Windows 7 Home license and I have upgraded this machine to Windows 10 and it is up-to-date. However, two out of four RAM modules, or buses, are not functioning at all, so I was running with 4 GB ram for like half year. Untill today.
My father's company had some left over desktops with pretty good stuff in them. So as my motherboard only supported 8GB RAM, I decided to take new motherboard (alongside with new i7 CPU and 16GB RAM) from one of the desktops, not touching the hard drive. I installed everything on their places and I was booting up my computer just fine untill it tried to get on the login screen.
I was wondering why does it take so long to get on the login screen, but then I realized that when you switch motherboards, the old drivers cannot obviously be found. I started to "panic" a little and googled around to see what to do. But luckily, after two automatic reboots, it got eventually on the login screen and I was able to login. First I was wondering why all the shortcuts on my desktop are missing (Well I have only 4 of them so not a big deal to add them back) and then I tried to check if Windows Update had found any updates to these new drivers.
I found out that Windows is not activated. I used ProduKey to find out my Windows 7 Home product key since there was no sticker anywhere but it was unable to verify it (yes I realized it's verified to the old motherboard). But luckily again this leftover desktop had the sticker on the case with valid product key. I entered it and it was verified, but then the activator told me to change to Pro version. When I pressed cancel to that, it didn't activate.
So my question is what happens when I upgrade to Pro version. Will this Windows 7 Pro product key work? Does the upgrade remove programs/files (I don't have my backup hdd currently here...)? If everything would go fine, can I forget I have ever had Home version (and can I forget the Home product key as well)?
And sorry for quite long post and sorry for my English too. It's not my native language.