If you have your original DVD, you can create an ISO file from it using a tool like ImgBurn.
Modern hardware (Intel 10th Gen or newer, and AMD Ryzen) lacks official Windows 7 drivers. You may find that your keyboard, mouse, or Wi-Fi doesn't work during or after installation. microsoft windows 7 media creation tool
Installing Windows 7 on modern computers (Intel 6th Gen or newer / AMD Ryzen) is notoriously difficult. These systems often lack "Legacy Boot" support and require specific to be "injected" into the ISO before the keyboard and mouse will work during the installation process. If you have your original DVD, you can