BSOD when trying to install Windows 7 (0x000000A5)

The error code, in your case, indicates that ACPI was unable to load a table. See chapter 5.2 in http://www.acpi.info/DOWNLOADS/ACPI_5_Errata%20A.pdf, ACPI was unable to load any of those tables.

You can probably not install Windows 7, because it's not supported by your laptop.
ASUS has drivers for Windows 10 only, but unless there's an option that tells the BIOS to adapt some features for compatibility with Windows 7 I don't think you will be able to install Window 7.

This kind of option is what I mean.

As you have already tried most of what is on the internet, there's not much more that can be done.
I explained my opinion in my previous post about this matter, I wouldn't recommend to continue trying to install Window 7 when this might very well be impossible.

Thanks for your input axe0! I always learn something from the veterans!

Thoroughly reading pdf with the hyperlink you posted.

After reading your post, I remember reading something to that effect a few weeks ago. Old age, slow memory.

Balta said:

Well... that's pretty weird, there is something with the BIOS, because if you see some hidden menus on the program there are ACPI settings.

Every pc I know has ACPI settings that are used by systems the vendor provides support for. Although this may not count for every system, it does count for quite a few of them. Some can install windows versions the vendor doesn't support whilst others can't for different kinds of reasons.

What options are there in your BIOS?