Can I install Windows 11 on non UEFI?

You can install Windows 11 on a non-UEFI system like your Dell N7110, which uses an MBR partition scheme, by bypassing the UEFI, TPM, and CPU requirements using tools like Rufus. Rufus enables creating a bootable USB with Windows 11 that removes these hardware requirement checks.

Regarding upgrading from Windows 10 to Windows 11 on the same machine by running the setup.exe from this media: yes, it is possible. Rufus supports creating installation media that can run the Windows 11 setup directly from Windows 10 to perform an in-place upgrade while bypassing TPM, Secure Boot, and CPU checks. This method typically works on legacy BIOS and MBR systems.

However, a few points:

• The default Windows 11 upgrade expects a GPT disk and UEFI boot; Rufus circumvents that for fresh installs and upgrades on legacy BIOS and MBR, but it is unofficial and could have limitations.
• You might need to apply registry patches or use Rufus's "Extended Windows 11 installation" option during USB creation.
• While the upgrade can be done via setup.exe for in-place upgrade, beware of potential compatibility or update functionality issues afterward.
• Always back up critical data before proceeding.

Summary:

• Fresh install of Windows 11 on legacy BIOS + MBR using Rufus is fully supported by Rufus's bypass features.
• Upgrading from Windows 10 to 11 in-place on non-UEFI/MBB system using Rufus-created media by running setup.exe is possible.
• Use Rufus beta version, select appropriate options (MBR partition scheme, target BIOS or UEFI-CSM), and enable bypass flags for TPM, Secure Boot, CPU.
• Expect some unofficial workarounds; back up and test comprehensively.

This aligns with recent user reports and guides on Windows 11 installation and upgrade on non-UEFI MBR systems