Is your processor 64 bit capable if you're trying to install 64 bit Windows 7? If not install Windows 7 32 bit.
Confirm the Windows 7 ISO download and write to flash stick using Universal USB Installer
with Windows 7 in drop down menu.
If this fails then reset BIOS to defaults: Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS
Wipe the HD before install using Diskpart Clean Command.
Test your HD using maker's HD Diagnostic
extended CD scan, followed by Disk Check
run from installer Command Line (press Shift+F10 at first screen) on a full disk partition you create and mark Active to try install, following step 2.2 here: SSD - HDD Optimize for Windows Reinstallation
Next remove all but 2gb RAM to try install. Swap RAM sticks, check for debris is slots, test your RAM - Test with Memtest86+
Unplug all other HD's and peripherals.