: This is a digitally distributed version of the software, usually intended for those who need to download and install or reinstall Windows. It's a more eco-friendly option that reduces the need for physical media.
: Suggests that the ISO or the installation media has been checked for integrity or authenticity, possibly to ensure it hasn't been tampered with. windows 7 sp1 x64 11in1 oem esd ptbr march 202 verified