I royally screwed up. What was I thinking messing with partitions? After partitioning my one hard-drive using Easeus Partition Manager 3.0 and letting the computer reboot, it gave the "no operating system found" message. All attempts to fix the problem through reinstalling vista using a boot disk on the harddrive, including attempting to format the harddrive gives Error code 0x80070057. How can I fix this problem without using programs that rely on an OS?