everytime I try to open the game there's a pop up saying "invalid partner properties signature", does anyone know what tf is going on

After I switched from full-screen to windowed mode the game has completely froze, displaying a white screen that I can't interact with and playing the menu music in the background. It goes to this white screen whenever I open the game now rendering it unplayable. No matter what I do I can't seem to revert or change it....

I recently found my mom's old installation disk. But the installation from that is corrupted, so I came and bought it here so I could enjoy her favorite childhood game. I haven't even gotten to play it. Every time I try play it, all that pops up is a white screen. Doesn't do anything else. PLS help!...

Hello, Is there a way to change the size of the window? It's super tiny on my ultrawide monitor. I'd found the file that holds this info but if I make any changes then the game won't even start anymore due to partner signature being wrong. Thanks in advance....

any fix for the fatal error at startup? I don't even have to press a button, immediately has an error.