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#11
The steps are in the tutorial to install in EFI mode. Otherwise set your DVD drive or USB flash stick first to boot in BIOS setup, not the EFI boot disk.
If install fails google the verbatim text of error code and number to see how others have solved it.
Follow these general steps to get a perfect clean reinstall of Win7, based on thousands we have helped with here: Clean Reinstall - Factory OEM Windows 7