We have 3 laptops that came with pre-Installed Windows 8 Single Language OEM.
We don't want to use Windows 10 right now but maybe later someone need to use it so I want take advantage of free upgrade to Windows 10 so I can use it after 29/07/2016 (the last day of free upgrade offer) without purchase Windows 10 Key.
So I install windows 10 side-by-side with old Windows 8 using same product key and all 3 Windows 10 are activated ,but when I asked about this in SU I found this wrong way:
At any given time you are only allowed to have Windows 8.1 or Windows 10 installed on the machine. If you have both installed then you are in violation of EULA. – Ramhound
Now I will delete windows 10 and uprgade windows 8 to windows 10 and activate it, then I will restore Windows 8 from backup partition (reset).
My question is :
if I do that can I perform clean install of Windows 10 and activate it using product key embedded in BIOS after 29/07/2016.
I have old bootable flash drive that I made on 29/07/2015 (can I use it? or I must download and create new one) as I read in the net that new Windows 10 Version 1511 can use Windows 7,8,8.1 Key
I don't know if my way is good, if there better way?