For those who still need to run this software (legacy lab equipment, industrial control systems, or air-gapped research machines), here are the core specs of the original ISO:
Microsoft no longer hosts official Windows 7 download links for the general public. However, because "National Academic" is essentially a specialized license, you can often use a standard Windows 7 Professional SP1 ISO to reinstall. windows 7 pro natl. academic only oa iso
: This signifies that the license is an OEM (Original Equipment Manufacturer) version pre-installed by the manufacturer (like Dell, HP, or Lenovo). For those who still need to run this