Make sure you are using the installer ISO provided here and burning to DVD or writing to flash stick using the tool in Step 1 and 2 of Clean Reinstall - Factory OEM Windows 7
Please describe exactly what happens when you boot the installer, choose Custom Install, use Drive Options to partition if you wish, or just click Next? At what step in Clean Install Windows 7
does it fail, and what is the verbatim error message if any?
Reset BIOS to defaults, while in BIOS setup set SATA controller to AHCI to try install.
If fail continues try wiping the HD with Diskpart Clean Command.