Because Microsoft no longer provides direct download links on its main website, users must rely on alternative repositories.
Search for "Microsoft Windows 7 SP1 x64 official download" – but remember, you must already own a valid license key to stay compliant with Microsoft's terms of service. Download Windows 7 Uefi Iso
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: If you are using a Dell machine that originally came with Windows 7, you can often download a recovery ISO specifically for your device by entering your Service Tag. Making the ISO UEFI-Compatible Because Microsoft no longer provides direct download links
Press F2, DEL, or F12 during startup.