>>105673548
Easiest way out: install Windows 8.1 (there have been update packs available for it in MyDigitalLife, just make sure you use the latest official ISO with Update 3 as a base), and slap a Win7 Aero visual style plus StartIsBack+, OldNewExplorer and glass8 (try finding a license or a crack for it - or hope that OpenGlass-legacy didn't completely drop support for 8.1). The TILEZ-based tablet UI is one of the biggest fuckups by microshart, although that can be ameliorated. Plus with 8 introducing native support for modern hardware standards (like USB3, NVMe, UEFI Class 3 support - including GOP support, HID over I2C, etc.), expect much less hardware-related fuckups.

But if you are still eager to install 7. Consider this:
>did you drag and drop the ISO to UpdatePack7R2's executable, and flashed the output ISO (Rufus, or maybe booting from the ISO image file with Ventoy?)
>Windows 7-era bootfiles and the setup engine doesn't really like your hardware; maybe it's best to transplant install.wim into a Windows 10 install ISO? - Enthousiast's MDL Win7 tool does this sort of trick
>or just use WinNTSetup to deploy Windows? (hell, you can even deploy Windows manually by yourself - make use of diskpart to prepare your drive and the right partition layout for GPT/MBR, use DISM to apply the system image to the Windows partition, then install the boot manager and make the system bootable with bcdboot)
>presumably your mobo's CSM implementation is actually fucking shite? In which case CSMWrap might help.

I hope you find the right drivers for the hardware, and whether that one chink modder offers them for your AyyMD mobo.