I am having this same problem too except it's with the non 64 bit version. My current system is kinda old: AMD Duron 1200 (unlocked but not overclocking), 512MB Ram, a VIA KT113A chipset K7T Turbo-R LE mainboard, an S3 Trio Video card (yes its old, getting an XTasy Radeon 9550 AGP for it soon), 12X DVD Rom drive, Maxtor 8GB HD (getting a Seagate 40GB soon too), and a Linksys Network Adapter. My PnP OS setting is set to off, if it makes a difference. I also MD5Summed the ISO's and they are all good.