builtbybel/flyoobe

★ 6,910C#Audience · generalComplexity · 2/5Setup · easy

Mindmap

mindmap
  root((FlyOOBE))
    What it does
      Bypass hardware checks
      Install Windows 11
      Customize setup
    Bypassed requirements
      TPM 2.0
      Secure Boot
      CPU check
    Features
      Auto ISO download
      System tweaks
      App removal
    Limits
      POPCNT required
      No update guarantee

mindmap root((FlyOOBE)) What it does Bypass hardware checks Install Windows 11 Customize setup Bypassed requirements TPM 2.0 Secure Boot CPU check Features Auto ISO download System tweaks App removal Limits POPCNT required No update guarantee

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Things people build with this

USE CASE 1

Upgrade a Windows 10 PC without TPM 2.0 or Secure Boot to Windows 11 by bypassing the hardware check.

USE CASE 2

Customize the Windows out-of-box experience by removing pre-installed apps and applying tweaks during setup.

USE CASE 3

Use the minimal classic Flyby11 tool included inside FlyOOBE for a straightforward unsupported-hardware upgrade.

Tech stack

C#Windows

Getting it running

Difficulty · easy Time to first run · 30min

The POPCNT CPU instruction is a hard requirement for Windows 11 24H2 that FlyOOBE cannot bypass.

In plain English

FlyOOBE (previously named Flyby11) is a Windows tool that installs Windows 11 on computers that do not meet Microsoft's official hardware requirements. Microsoft requires specific features like TPM 2.0, Secure Boot, and a supported CPU for Windows 11, machines that lack these are blocked from upgrading through the normal Windows Update path. FlyOOBE provides a workaround to install Windows 11 on those machines anyway. The method it uses routes the upgrade through the Windows Server variant of the setup installer, which does not apply the same hardware checks as the standard Windows 11 installer. The result is regular Windows 11, not a server operating system. The README notes this approach matches a workaround documented by Microsoft itself. ISO downloading and mounting are handled automatically by the tool using a third-party script called Fido. FlyOOBE is an expanded version of the original Flyby11 upgrader. Beyond the basic Windows 10 to Windows 11 upgrade path, it adds tools for customizing the Windows out-of-box setup experience, applying system tweaks, removing pre-installed software, and scripting parts of the initial configuration. The classic Flyby11 upgrade-only tool is included inside FlyOOBE and is also available as a separate download for users who only want the minimal version. The README notes that the POPCNT CPU instruction is a hard requirement for Windows 11 24H2 that cannot be bypassed, a compatibility checker was added in version 2.3 to warn users whose hardware hits this limit. Microsoft states that unsupported devices are not guaranteed to receive future updates, which the README quotes directly. FlyOOBE is available from the repository's Releases page and accepts donations toward continued development.

Copy-paste prompts

Prompt 1

I have a Windows 10 PC without TPM 2.0. Walk me through using FlyOOBE to upgrade it to Windows 11 step by step.

Prompt 2

How do I use FlyOOBE's compatibility checker to find out if my CPU supports the POPCNT instruction required for Windows 11 24H2?

Prompt 3

What system tweaks and pre-installed app removals can I apply using FlyOOBE during the Windows out-of-box setup experience?

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