Windows 10: Product Key of win 7 Pro works in win 10 Pro fresh install

I want to install windows 10 pro and win dev tools VS2015 Community...

on my MacBook Pro 4-cores/16GB/256GB

I have Windows 7 Pro license and VMWare Fusion Pro license

What to do???

Product Key of win 7 Pro works in win 10 Pro fresh install...as a VM? Or have to install win 7 pro and upgrade?

Users accounts in win 10 pro
a user can see by anyway other user files? Emails outlook, or passwords in chrome or robofirm password manager...?
to switcgph users needed shutdown... ? For user creation ms account is optional?

:)

 

Windows 10 download / upgrade

Will the one ISO work on multiple machines? We have a mixture of WIN 8.1 PRO and WIN 7 PRO.

When running the ISO, can I install a fresh WIN 10 installation on all pcs using the Probuct key for that computer (ie Not an uprade).?

Will the ISO upgrade the existing WIN 7 & 8.1 pcs with their product key?

 

Upgrade Windows 7 PRO Product key to Window 10 PRO Product Key

Dear,

Kindly be informed that 2 months ago I upgraded my laptop from win 7 PRO to win 10 PRO without asking any product key and now I need to reinstall windows 10 in my laptop for fresh installation so how can we activate this windows 10 with original product
key using Windows 7 Pro product key.

 

I don't believe putting a Windows 7 Pro Product key into the Windows 10 installer will work.
You'd have to clean install Windows 7 Pro and activate it using the Windows 7 Pro key you have then do an upgrade to Windows 10 - once Windows 10 is activated your hardware hash is remembered by Microsoft.
This means you wouldn't have to install 7 then upgrade to 10 again if you wanted to wipe, you'd just install Windows 10 and Microsoft Activation would detect that your machine's hardware hash matched and activate.