🔹 Introduction
If your PC doesn’t meet Microsoft’s official requirements for Windows 11 — like lacking TPM 2.0, Secure Boot, or a compatible CPU — don’t worry. As of 2025, there’s a simple and updated way to install Windows 11 on unsupported hardware, and it doesn’t require any command-line tricks or registry edits.
Let’s get straight to it.
Step 1: Check If Your PC is Compatible
Download the PC Health Check Tool from Microsoft:
👉 https://www.microsoft.com/en-us/windows/windows-11#pchealthcheck
Use this tool to see if your PC passes the basic requirements. Most unsupported PCs will fail due to:
- CPU not on the list
- TPM 2.0 or Secure Boot not enabled
If you fail because of the CPU, don’t worry — we’ll bypass that!
Step 2: Download the FlyBy11 Tool
This script is CMD-free, meaning it has a simple user interface.
- Download from the developer’s official page : https://github.com/builtbybel/Flyby11
Download FlyBy11 - Extract the
.zipfile using built-in Windows extractor or 7-Zip - Inside the folder, right-click on
FlyBy11.exe→ Run as Administrator
If you get a Windows warning: click More Info > Run Anyway
Step 3: Check CPU for SSE4.2 and POPCNT
Before proceeding, make sure your CPU supports SSE4.2 and POPCNT instructions. These are critical for Windows 11 24H2 and 25H2.
✅ Supported:
- Intel CPUs Gen 3 and newer (2010+)
- AMD FX series and newer
If your CPU only supports SSE4.1 or lacks POPCNT, you cannot upgrade to Windows 11 24H2 or newer.
Step 4: Download the Windows 11 ISO from Microsoft
Go to the official Microsoft site:
👉 https://www.microsoft.com/en-us/software-download/windows11
- Scroll down to “Download Windows 11 Disk Image (ISO)”
- Select Windows 11 (multi-edition ISO)
- Choose your correct language:
en-USfor United Statesen-GBfor United Kingdomen(International) for other countries
To check your current language, run this in CMD:
Even if you don’t want to use CMD, you can copy and paste this line from my site.
Get Security Updates on Windows Updates Catalog:
https://www.catalog.update.microsoft.com/Home.aspx
Step 5: Start the Upgrade Process
Once you have the ISO file:
- Open FlyBy11
- Drag the ISO into the tool OR click “Select ISO”
- Wait for it to mount the ISO
- Keep the option “Download Drivers” enabled (recommended)
- Proceed with installation steps
If you don’t see the “Keep files and apps” option, it means your ISO language doesn’t match your current Windows language.
Step 6: Fix Common Installation Problems
If setup is stuck or fails:
- Unplug all USB devices (except keyboard and mouse)
- Disconnect cameras, external drives, hubs, etc.
- Delete temp files:
If it still fails, try my other video tutorials linked below the video or blog.
💡 Fix Boot Issues: Enable AHCI Mode in BIOS
To fix this, make sure AHCI is enabled in your BIOS. Here’s how:
Restart your PC and enter BIOS (usually by pressing
DEL,F2, orF10when the system starts).Go to the Advanced, Storage, or SATA Configuration section (varies by motherboard).
Find the setting called SATA Mode or Storage Mode.
Change the value from IDE or RAID to AHCI.
Save and exit BIOS.
After enabling AHCI, your system should boot into Windows 11 without problems.
How to Convert MBR to GPT Using Command Prompt
Follow these steps:
Open Command Prompt as Administrator
PressStart, type cmd, right-click on Command Prompt and choose Run as administrator.Validate the Disk for Conversion
Convert the Disk to GPT
📝 What Happens Next?
Step 7: Verify the Upgrade
Once complete:
- Go to Settings > System > About
- You should see “Windows 11 Pro / 24H2”
- Windows will still show the CPU as unsupported, but updates will work.
You will get:
- Security updates
- Driver updates
- ❌ Major upgrades (like 25H2) won’t install via Windows Update — you’ll need to repeat this method.
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