Microsoft Store has the upgrade license and product key for $99.00 acessible from Win 10 home installations. 
 
http://www.howtogeek.com/234946/how-to-upgrade-from-windows-10-home-to-windows-10-professional/
 
 

When I upgraded I saw at lot of probably dodgy cheap keys being sold, even via Amazon & Co (some users claimed the received key works, some other say it didn't) ... which made me wonder how Amazon/Microsoft allow that ...
 
Anyway, I needed a fast & definite & of course legal way to upgrade so I stopped researching and ended up buying from microsoft store app but not getting the $99 upgrade (was more like double which may just be the European price, maybe a payback for all the hard time the EU has given MS) ... enter credit card, the next moment your machine is win10 pro ...

bapu
Hard to believe that someone here would have a non-DAW computer, huh?

OK, so I also have a non-DAW computer...a Galaxy Note7. 

bapu
Hard to believe that someone here would have a non-DAW computer, huh?

That's not to hard to believe .On my non DAW  the updates were happening too fast for me so I went back to this.

 
Kenny