I'm having problems installing halo PC, it keeps either, stopping at 85% and not going further, or it comes up with a message, the message says "Halo Setup encountered a disk error while writing to the file C:\Program Files\Microsoft Games\Halo\maps\sounds.map. Make sure your hard disk is not full, and that the file is not in use." It worked on my computer before it stopped working, so I bought a new operating system, and that didn't work, and it turned out that the graphics card kept overheating, so I used the graphics card from my old computer, (Radeon 9200 SE 128mb), but now halo won't work, help would be greatly appreciated.