The solution is simple to install Windows 10 without Product Key, this is possible whit Windows 10 Pro N and with Windows Home Version!
Please download The Windows 10 via Ms Download Tool from Windows 8 or Windows 7 OS and insert the Windows 10 USB installation Stick or Installation DVD.
Start the Windows 10 installation (... see Image-1)
Skip the Product Key (... see Image-2 Arrow-1)
And skip the the second product key query. (... see Image-3)
That is it :-)
See also: Download Windows 10 all Version || How long does it take to install windows 10 (download)?
Activation helps verify that your copy of Windows-10 is genuine and that it has not been used on more computers than the Microsoft Software License Terms allow. In this way, activation helps prevent software counterfeiting.
The information collected during activation will not be used to contact you.
It's required You have 30 days after installing Windows 10 to activate it online or by telephone. You need to activate Windows 10 before this 30-day period expires.
It's Time to enter the Windows-10 product key
If your Windows 10 product key is not valid, if you don't have a Windows-10 product key, or if you lost the product key that came with Windows, you'll need to buy a new one to activate Windows 10. You must activate Windows online or by phone within 30 days of installation to use every feature of Windows 10.
To buy a new genuine Windows product key, go to the genuine Windows website, check to see if Windows on your computer is genuine, and then follow the instructions to buy a new product key.
If you already have genuine Windows 10 and want to get additional product keys so you can install Windows on other computers, go to the Additional Licenses website.
FAQ 119: Updated on: September 30th 2016 14:29