Hiren's Iso -

Hiren’s Boot CD (or Hiren’s Boot USB) is a lightweight, bootable recovery environment based on Windows PE. It’s designed to help you troubleshoot, repair, and recover computers that won’t boot normally. The “ISO” refers to the disk image file you can burn to a CD/DVD or write to a USB drive.

Here’s a helpful, informative text about (often called Hiren’s ISO ): What is Hiren’s Boot ISO? hiren's iso