The "Live Access Code" for Street Fighter IV is a key to a bygone era of online gaming—an era of clunky Microsoft clients and aggressive, often counter-intuitive DRM. While there are still ways to coax the original PC release into running online, the process is fraught with technical hurdles.
Here is how the core unlockables from that era are actually obtained: street fighter iv live access code
The most reliable way to play Street Fighter IV on PC today is through Steam. Steam has patched many versions of GFWL-enabled games to function properly, or they have removed the GFWL requirement entirely. The "Live Access Code" for Street Fighter IV