Question: Where can I download the latest version of Games for Windows-LIVE?

Answer: Grand Theft Auto IV PC requires the installation of Microsoft's Games for Windows-LIVE to run.

To ensure you have access to the necessary files needed to run the game, please refer to Microsoft's own website and instructions for downloading the latest version:

http://www.xbox.com/en-US/LIVE/PC/DownloadClient

http://support.microsoft.com/kb/977845

Note: Attempting to update Games for Windows Live from inside GTA IV, or using older updates posted on rockstargames.com may result in "Fatal Error: WS10" when attempting to play.  Downloading and updating the GFWL client directly from Microsoft reduces the chance of this error.  For more information, please see:

http://support.rockstargames.com/entries/479465-ws10-error-in-gta-i...