My system is: AMD Phenom II X4 965 Black Edition Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" ASUS M4A79XTD EVO Motherboard 4GB RAM 240-Pin DDR3 SDRAM DDR3 1600 ATI Radeon HD 5770 1GB GDDR5 I am sure that everything is assembled correctly, and everything is compatible. My system recognizes everything I have in it. The first thing I tried to do was install windows 7 onto my system from a burned copy I have, as my original disk is at a different location. My installation errored out during the "Expanding Installation Files" process, and during later attempts would just stop loading at various percentages. I assume that is a problem with the disk itself, so I tried a friend's copy. I know this disk has worked for him. When I put the disk in and try to boot from disk, it doesn't give me that option, it just says "BOOTMGR is missing press ctrl+alt+del to restart". It's strange, because I can still boot from the first Windows 7 disk I used, but it will not install correctly. I'm unsure as to why I can't boot from the newer one I have. My DVD drive is first on my boot priority list. I even tried updating my BIOS from the disk that came in my motherboard packaging. I'm going to give it a try on some other OS disks to see if it will format my drive and install. Anyone have any suggestions? This is driving me absolutely insane.