addict90: 1. Windows 8 and 10 require people to have direct play feature installed on their windows installation to do this they need to go to start menu and search "uninstall" where the search would popup with "uninstall a program" click to launch it's windows in this window on left side there is a option "turn windows features on or off" click it to open a new window. Wait a little for it to load all things then find "legacy components" expand the "+" and check the direct play feature and press "ok" to have it installed by windows.

2. Windows from vista to 10 require the the game launching file to be run under certain compatibility, to do this right click on the game file and select "Properties", new window will popup and then select the "Compatibility" tab in this new window. In Compatibility mode select "windows xp service 2 or 3, or windows vista or it's service pack1" any one of them should work. Check the disable desktop composition and check the disable the visual themes(windows 10 don't have these options so don't worry over them). Also select "run this program as Administrator".

after you did that, try to start the games .exe in the installation folder, not through gog galaxy, should work