And thank you too! Great answer!

Could you be more clear about that?

haha, that was perfect, thanks.

Thanks for that, I understand, but this is what is happening.

I have a Win 7 install with a key of xxxx-xxxx-xxxx-1111
And another with a key of xxxx-xxxx-xxxx-2222

I upgrade both to Win 10...

(I must confess I did not read the entire thread.)

I have 10 Windows 7 Ultimate licenses, but they came from my BizSpark license years ago. They should be MSDN versions.

If I upgrade two...