I am running Arcanum through the GOG Downloader on a windows 10 PC, and with the terra-arcanum patch it works quite well in full screen mode, but I want to get it to run in windowed mode. I tried putting -window in the properties window, but whenever I tried to start up the game, it would go unresponsive immediately and have to shut down.

It should be noted I am also getting some graphical problems. My screen will turn into a jumbled mess of pink pixels, buttons will stop working, dialogue will clump together into ugly white smears, and entire sections of the map will be black.

I have the same issues, regarding both posts. Though my game just crashes when trying to start it in windowed mode.