Hey everyone! I just bought parts for a new system build: AMD Phenom II x6 Thurban Blk Edition 3.2 Ghz 16 GB Corsair Vengeance PC 1600 ASUS M4A87TD EVO mobo Nvidia Geforce 560 Ti 1GB Gfx card Sony Optiarc 56x CD/DVD rom (SATA) WD 2TB 7800 RPM HD (SATA) After piecing everything, it fired right up so I went into BIOS and set the boot priority for DVD rom > HD. Placed my windows 7 64 disc in, saved and exited, and things seemed to go ok until windows gave me the error code mentioned in the title of this thread. "Windows could not format the partition on disk 0. The error occurred while preparing the partition selected for installation. Error code: 0x80070057." This error shows every time I try to install Win 7. The HD is brand spanking new, and I did click the "new" option in advanced settings to set and format a partition.The REALLY weird thing is that when this happens, my bios settings reset back to default values! Why is this happening? Do I have a bad motherboard? Bad HD? Bad OS disk? I don't have duplicates of anything so it's impossible to troubleshoot by elimination. I really don't know what else to do now, I'm close to giving up on this system and just sending everything back to Newegg and cutting my losses. Any advice would be golden at this point, thanks for any help you guys can lend! *UPDATE*: I swapped SATA cables, ran the in house mem diagnostic (found no errors), even tried dfferent SATA ports on the mobo, and I still get the same results. Things seem to be getting worse, however. Now windows sometimes doesn't even detect the drive, so to eliminate the possibility that the drive was DOA, I swapped to a known good drive, and I get the exact same result when attempting to either create a new partition, or format the existing one.