Well this shouldn't happen on windows 7 for one thing. I have no other operating systems installed on the system. This is occurring on the comp in my system specs. I have 4 hard drives in the system. One 80GB drive for the OS only and then 3 data drives. Two 250GB drives and one 1TB drive. I use the 1TB drive for backup and all my games, one 250gb drive has my music movies and pictures on it the other just has misc things on it. When I disconnect the three data drives and only leave the 80GB system drive plugged in windows 7 boots just fine. When I connect the three other drives the post screen stays at checking DMI pool for awhile and then the NTLDR is missing pops up. I tried repairing the installation with the Win7 install disc but it did nothing. Also reset the bios/cmos. nothing so far. Don't know what to do at this point. Any help is appreciated. UPDATE: Just noticed in the bios my 1TB drive is not detected but in a weird way, it is in there but the bios does not show its name like the other hard drives its just blank, like the bios detects it but doesn't know what it is. This has never happened before. Currently posting from my backup comp: Athlon X2 4200+ skt939, 2gb DDR400, HD3650 512mb GDDR2. stock everything FIXED My 1TB hard drive died and would not let the system boot.