upgrade from Win 10 to Win 10 pro using win 7 ultimate key?

lx07 said:

Or you can use ei.cfg :) Windows Setup Edition Configuration and Product ID Files (EI.cfg and PID.txt)

I don't think Windows 8 or 10 use an ei.cfg file? Might still be able to add one though, if you know what to enter in it. Also ei.cfg won't enter a key for you. You'll still have to click skip a couple of times when asked for a key when installing Windows 10. Still useful info though.

I was helping some people over on Reddit with this, and a user on there noted that when he clean installed, it installed the Home version (he had both versions activated in the past). He was able to go to the Pro Upgrade Pack in the Windows Store and it had an upgrade button. Didn't have to purchase anything. Worked the same as putting in the generic Pro key, but easier for anyone who doesnt want to have to look it up.

Someone should seriously take the info we've gathered in this thread and make a tutorial or two. Or at least a stickied thread because I'm sure this will come up somewhat often.