Can you use a windows 7 or 8 serial key on windows 10?

[The Videogamer]

I want to use windows 10 on my mac through bootcamp. I have a windows 10 ISO file and a windows 7 and 8 key. I was wondering if I could use my previous windows serial keys on windows 10 because microsoft is giving free upgrades.

 

[bignastyid]

You'll have to install 7 or 8 then upgrade to 10.

 

[dodger46]

I want to use windows 10 on my mac through bootcamp. I have a windows 10 ISO file and a windows 7 and 8 key. I was wondering if I could use my previous windows serial keys on windows 10 because microsoft is giving free upgrades.

What bignastyid said, and make sure you match the 10 ISO to the correct version, i.e. if Win7 home use standard 10, or 7 Pro to 10 Pro
Use Produkey by Nirsoft to find your Product key once you've installed and upgraded 7 or 8.

 

[theonerm2]

For some reason I got Windows 10 Pro on my laptop and I upgraded from Windows 7 Home Premium. No complaints about that though.