I'm having a similar issue. I get the error: "0x80070057" at the point of "Completing installation". The files expand and features install, but when I get to the point mentioned, I get this error message. I know that Intel doesn't officiall support my chipset (875P) for Windows 7 or Vista, but I am running Vista with no problems on a clean install. The error message states that Windows could not configure the boot manager. The disk I'm using is an OEM disk.