[quote][b]Posted by:[/b] StainingBat26 Thanks Wilis_kid. I just got off the phone. Spoke with a Microsoft service representative (not a technician). She was no dunce though, and was happy to explain that Microsoft does not re-issue CD/DVD keys for unsupported software, blam. I did fully update GFWL before installing Halo 2 for the second time. At this stage, I feel like Microsoft is preventing the operation of an unsupported product on purpose, to boost sales of Halo 4, and their Xbox console, something that I will likely not buy. I'm holding out hope that my problem is a legitimate technical issue, but would like to hear from others in the same situation who HAVE successfully installed/run Halo 2 since 10/9/2012.[/quote] I'm sorry to hear about that. You could try again in a week or two and hope that you get to speak to someone different but i'm unsure if this would make a lot of difference. As for not supporting H2V, Microsoft has been trying to distance itself from the game for years. Whilst Halo 2 was a resounding success on the Xbox, the team that Microsoft quickly put together "Hired Gun" did a terrible job porting the game resulting in the huge numbers of problems that people encounter. The game was poorly received with PC gamers due to it essentially being a Console game running on a PC rather than ported properly like the original Halo was and as such, coupled with the brilliant feature to enhance gameplay with only 5 installs...well, you know the rest.