I have a Toshiba Laptop Vista 64 bit , and I can not get the Halo 2 disc to recognize on my computer. The DVD rom is fine since I tested it with both a CD and DVD (both are recognized). Halo 2 just seems to crash my computer. Is it a compatibility issue or something else? I also get the message "windows explorer has stopped responding" and When i restart windows explorer the desktop, including the taskbar refreshes. This only happens when I put Halo 2 in the DVD rom. Computer also runs really slow with it in. Any ideas?