Mini map showing resources as a square block

Hi All,

I am playing AOE4 on an old, and unsupported PC (I know, shoot me).
Specs:
Asus N76VZ
16gb ram
Nvidia geforce GT 650M with 2gb vram
Intel i7-3630QM

I am running windows 10 on this PC, which is the start of my problems, Asus only support windows 8.
This means that the video drivers are flaky, I cannot upgrade to latest drivers as the switch between integrated and nvidia does not work (and bluescreens the PC), the best I have found to work are 353.62 on DirectX v12.

Now, here is the issue.
The game runs pretty well in full HD (1920x1080), all rendering looks good, no crashes, performance is acceptable for a 4 player game.

However, the mini-map just shows square blocks instead of icons.

I tried a directX cache clean, and I tried playing with in-game graphics settings but could not get this to work.

Can anyone suggest something (apart from updating to latest video card driver) ?

Thanks in advance
Sprite