Yes, I believe that's what we're talking about. I suspect this same installer has been modified and upgraded for a decade without changing that background. I do not have the script, but I am trying to figure out how to resolve these DPI issues using my own test scripts so that I can provide a solution to the author of the script. If I should have the installer author remove the background in order to resolve this, I can work on that.
For all screenshots, note that this is a windows VM at 3840x2160 running on my macbook pro and the screenshot is taken from my macbook pro.
Screenshot of installer full screen with no compatibility mode changes: https://cl.ly/3v2I2S3i452a (note the overlaid text at upper left. The screenshot does a poor job of showing how tiny the dialog font looks, unfortunately.)
Screenshot of installer full screen after setting "system" override in high DPI section of compatibility settings: https://cl.ly/3T1E0n1k2Y0c
So that you have a full spectrum answer:
Here's a screenshot of the VM with the display settings next to the dialog:
Here are a couple of photos of my 4K monitor, with the windows VM running in it at a resolution of 3840x2160 and the MSI dialog on the screen:
Here's a screenshot of the MBP monitor setup for the 4K monitor:
I hope this conveys what we're trying to resolve and gives you the info you need. BTW, the end user who brought this to our attention was at 250% magnification on Win10 on a 4K monitor, with no VM or other complicating factors.
Mark