Clean install windows question

[Member]

I am currently using Windows 10.

I upgraded from Windows 7. 

If I want to do a clean install of Windows 10, do I just enter my product key (Win 7 key)?

 

OR

 

Would use the CD  key found by my keyfinder which is installed. (Win 7 key was from a friend, forgot key so used a keyfinder)

 

OR

 

Would I have to start from Windows 7 and upgrade again?

 

 

 

 

Would this be the same process on a new motherboard? 

 

Thanks

[Shimejii]

should be able to just install windows and activate key later as windows 10 binds the key to the motherboard

[Guest Gabbs]

No key is needed now since you already activated W10.

Next time during installation choose the option to skip having to enter a cd key and it'll activate later when you connect to the internet.

 

About motherboard: Windows will not activate if you change the mobo.