At exactly what point does the installation fail, using the tutorial here as a timeline? Clean Install Windows 7
What is the verbatim exact failure error message?
Try entering Device Manager via Safe Mode to uninstall any driver in error: Device Manager - Access During Windows 7 Installation
As a last resort when all else fails, I move the HD to another machine to install, then SysPrep the HD before moving it back to problem machine. SysPrep removes all drivers and prepares HD to start up on new hardware. Windows 7 Installation - Transfer to a New Computer
You can also SysPrep another Win7 installation of the same version on another machine, save a backup image, then boot Win7 DVD Repair console or Repair CD to reimage to the problem machine. Backup Complete Computer - Create an Image Backup
System Image Recovery