New
#71
As far as I can see you can download the correct version home for home premium and try to activate it with the key,
Or go to Newegg or similar and buy 10 pro 64 bit for 140.us opposed to 199.99 from M$ which the 200 version includes 32 bit as well,
Newegg... offers separate versions for 32 and 64 bit so 140.us is less
Not sure what the deal is on the key for buying win-10 I have not done it :)
Microsoft Windows 10 Pro 64-bit - Newegg.com