I think it's just a compatibility issue. You SHOULD be launching from the folder. (Right click launch gta icon and run as administrator.) I'm not 100% sure as to why that improves stability, but it does and you'll see people talking about that when people are having issues launching the game. Secondly, if you're wanting to take screenshots/video you can always download another program, such as fraps. There's plenty of free and paid programs that work well.