A lot of things are going on and I still have questions about other things.
Brave startup problems are easy to fix
To do this, 3 lines at the top right - Settings - at the top right (press the magnifying glass) and enter "Graphics" in the search line. Then deactivate graphics acceleration there. Brave restart and it works.
Mistake:
Spear screen only works for one (Horizon Sonoma only)
Screen brightness cannot be adjusted.
If the display goes into sleep mode, it will restart for no reason.
Every now and then short-term probes to open 2 Aps (1 to 2 seconds)
I have the feeling that USB is slow. It's also strange that some USB sticks are ejected quickly and others only eject immediately.
I put it under startup disk on Mac and restart the computer from Windows for whatever reason. Can only be influenced manually.
The BIOS is also set to boot from the Mac. But even then only Windows.
Do you have an idea?