Windows 10: I want reinstall my PC and want to get win10 pro key

Dear Sir,

I reinstall my pc and how do I get the win 10 pro key or what should I do?

:)

 

Upgrading OEM Win10 Home to MSDN Win10 Pro


Moving to a new PC that I'm building myself. Currently running Dell OEM Win10 Home. New PC will have Win10 Pro, MSDN (multi-activation or retail keys) version.


My backup software can do a "system transfer" that will allow me to transfer everything (OS and applications) to the new computer.


Should I upgrade from OEM Home to MSDN Pro on the old computer and then transfer everything to the new computer?


Or just install Win10 PRO MSDN on the new computer and use the backup software vendor's application transfer program to move the applications and registry entries?


My goals are:

1. Not have any "dinosaur bones" either from the OS on my SSD from the old OEM Home version on the new PRO version

1. Not have to reinstall and reconfigure everything (which would take about a week)

Thanks for any advice I can get...

 

Built new computer, running unactivated Win10 Home, have Win7 Pro key


I was initially thinking of buying a Win10 Home key, but I realized I still have a Win7 Pro key I purchased that I have never upgraded to Win10 and is not currently in use.

Two questions

• Can I use the Win7 key to activate Win10 (or is that no longer an option)
• Will Win10 Home turn into Win10 Pro (assuming I can still use key)

 

reinstallation of win10 (win 8.1 upgraded) - no win 10 key available, I have win 8 key

I had upgraded my Win 8.1 to Win10 during free upgrade. Now I have to format the PC and reinstall win10. Suggest how to go about the procedure. I have my win 8.1 key, when during reinstallation of win10 which key should I use, I do not have win 10
key, the system never supplied.