Hello everybody.

I've fiddled with the game for several hours now, but I seem to be unable to solve a problem with my mouse cursor.

As soon as the game properly starts(so after character creation and the intro vid), my mouse cursor disappears from the majority of the game.
It's still "usable", meaning my character moves to where I assume the cursor is, I can click on dialogue and as soon as I move it to any UI item or open the menu the cursor is there again. Basically, it seems to slip under the games graphics instead of being overlayed on it.

I've traced the error back to the High Resolution patch, since removing it solves the problem, but the low resolution is really offputting, so I don't really want to play without it.

I'm on windows 10
Things I've already tried, non of which worked:
-no3d and -doublebuffer in the shortcut
-all compatibility modes
-reinstalling the game
-trying out both the gog version and the multiverse edition
-software rendering on/off
-other resolutions
-windowed mode
-deleting ddraw.dll

Now I'm starting to run out of ideas. Any help would be appreciated.

Try checking "Disable visual themes", "Disable desktop composition" and/or "Disable display scaling on high DPI settings" in the "Compatibility" settings of the game shortcut.

Sadly Windows 10 got rid of these options.

I managed to find the visual themes deep within the system settings, but disabling them didn't help.
The option to disable desktop compostion is gone completely and the display scaling on high DPI settings can be changed, but not disabled. I tried all options there, again unsucessfully.

Sorry, I wasn't aware of that: my Windows 10 is up to date, but I haven't noticed those changes as yet.
I based my suggestion on an old thread where I was able to help another user (from Germany just like yourself) in solving the same problem. As you can read there, it solved the issue adding the "-no3d -doublebuffer" parameters to the game's shortcut and this is the most common solution to your problem, but you said you have already tried it. :-/

I'm short on other ideas: maybe you can try playing with the settings of your video driver (forcing or disabling V-sync for the game or similar settings may help), however I suggest you to insist trying with the solutions proposed in the old thread, combining them. I will post them here as well:

This is a fix for a HighRes 1.5 patch.

Sorry for necroposting, but it looks like a solution is to update ddraw.dll in a game directory - here is narzoul at github bumped version of DDrawCompat to v0.4.0 (you need a DDrawCompat-v0.4.0.zip) fixed the disappearing mouse cursor in-game.

The cursor is appearing only on game panels and is invisible above the game world.

The reason for the disappearing cursor was old ddraw.dll with this error message in ddraw.log:
1608 18:36:33.695 Incorrect z-buffer bit depth capabilities detected for "AMD Radeon(TM) Graphics" / Direct3D T&L HAL,

1608 18:36:33.695 changed supported z-buffer bit depths from "16, 32" to "16, 24"

I changed the PC after some time of playing, and instead of a shiny RTX 3070, I have now a laptop with integrated Radeon graphics. Was surprised by the new behavior.

I feel this is also a way to fix other old games.

My problem is fixed by restart chrome. https://thegeekpage.com/mouse-cursor-disappearing-in-google-chrome/