On Windows 10 you can make windows bigger by increasing the size % under system settings.For some games you can exit full-screen mode by pressing Alt+Enter in the game For some Multimedia Fusion games you can force them into windowed mode using the /NOF command line option.
32-bit games which open in windowed mode should work fine on Windows 10.The older the game, the more likely you are to have trouble playing it on Windows 10.