I've had the game for awhile and have actually played it when I got it, but I uninstalled it due to the "GTA IV has stopped working" error. I have been really wanting to play it lately so I reinstalled it and when it came time for me to put in my serial key, it wouldn't work. The way I got my key was from right clicking GTA IV and clicking on "View CD Key," is this the same thing? If not, where can I find my serial number for it? I also tried to open GFWL but it says there is a connection problem, and I can't open it, even though I have a perfectly fine internet connection. Can someone please help?