: Because Windows 7 no longer receives security updates, it is highly vulnerable to modern exploits like ransomware. If you must use it, it is strongly recommended to keep the machine offline or behind a robust hardware firewall.
: You must set your computer's boot priority to the CD/DVD or USB drive in the BIOS settings (often accessed by pressing F2 or Esc during startup). en-windows-7-ultimate-x64-dvd.iso
Microsoft Windows 7 Ultimate x64 English DVD ISO : Because Windows 7 no longer receives security