Bought this game just now, expected it not to work on Windows 7. On launch it shows a blank white screen, no video and sound. GOG video player isn't responding.

Go into the install directory on Windows 7, e.g "C:\Program Files (x86)\GOG Galaxy\Games\Worms 2"

Right click 'GOGLauncher.exe' and go under 'compatibility' and enable 'run as administrator' if disabled, then click check mark next to 'disable desktop composition', then click apply. Attempt a relaunch.

It's still very buggy, it causes windows explorer to be unresponsive, but GOG video player is fixed.