Microsoft previously offered official ISOs via the Software Recovery page. Today, that page redirects you to Windows 10. However, if you have a valid retail Windows 7 key, you can still use the (more on that below).
If you are using a stock ISO on a modern PC (Skylake chipset or newer), your USB ports will stop working once the installer loads because Windows 7 doesn't have the native drivers. Download Windows 7 Uefi Iso
If your installer fails to boot, you need to manually place the UEFI boot file. Extract your Windows 7 ISO files to a folder using 7-Zip. Navigate to sources\install.wim and open it with 7-Zip. Go to 1\Windows\Boot\EFI\ . Find the file named bootmgfw.efi . Microsoft previously offered official ISOs via the Software
\efi\boot\bootx64.efi # UEFI bootloader \efi\microsoft\boot\bootmgfw.efi # Windows boot manager \sources\boot.wim # Must contain UEFI-compatible drivers \sources\install.wim # Index 1: Windows 7 Ultimate (UEFI-prepped) \autounattend.xml # Optional answer file for unattended GPT setup If you are using a stock ISO on
Example official ISO names to look for (64-bit, UEFI-capable):
