Back to windows 7

[Phil_Paris]

I've bought an ASUS E202S notebook with a native Windows 10 64 OS preinstalled. I've tried to switch back to a windows 7 64 OS through a dozen of methods (UEFI, CSM, etc...). It doesn't work and it looks impossible (I'm not a beginner in computing). I think ASUS has locked the device through the BIOS because it's impossible to install unsigned drivers.
Maybe there is someone who is able to take up the gauntlet.
THANKS !!

 

[Paul NZ]

Could be because there are no windows 7 drivers for it on the ASUS site