Windows 7 is failing to install when expanding files 20%

Everytime I'm installing windows it fails and say that the is a missing or corrupted file.
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More about windows failing install expanding files
  1. bad windows copy.
  2. hi,

    or bad memory or hard drive.

    run memtest86 and install hard disk sentinel trial on another computer and put the drive in to check health status
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Configuration Windows 7