Now that support for Windows 10 is ending soon, users are starting to upgrade to Windows 11. Unfortunately, there is no officiële way for people with an unsupported PC to do this. That's where onofficiële apps like Flyby11 come into play. Absolutely our favorite.
Flyby11 is a lightweight patch utility that is designed to lift the restrictions imposed by Microsoft during the installation of Windows 11, in particular version 24H2. By bypassing hardware checks such as TPM, Secure Boot, CPU generation and RAM requirements, it makes installation possible on devices that would otherwise be blocked as unsupported. Flyby11 is designed for simplicity and efficiency and provides a minimal yet effective solution for enthusiasts, IT administrators and power users who Windows 11 want to implement seamlessly on a larger number of systems.
Flyoobe also improves the Windows Out-of-Box Experience (OOBE) by removing a number of restrictions that usually appear during the initial setup. It can disable mandatory sign‑in requirements for Microsoft accounts, allowing a local account to be created without workarounds. The tool also bypasses region and network checks, making it possible to complete the installation even when internet access is unavailable or limited.
Flyby11 (Flyoobe) key features:
Bypasses TPM requirement
Bypasses Secure Boot requirement
Bypasses unsupported CPU checks
Bypasses minimum RAM requirement
Removes other Windows 11 installation restrictions
Works with Windows 11 version 24H2
Lightweight and portable utility
No installation required
Simple interface and use
Download it from their website: builtbybel/Flyby11: Windows 11 Upgrading Assistant
The colleague from PCHELPFORUM has written a nice guide that will help you step by step: Installing/upgrading Windows 11 on an unsupported system – Working with Flyby 11 – Windows 11 – PC Helpforum

