How can I force to install Windows 11 on unsupported PC?

This is a very common case as many old PC does not have TPM 2.0.

TPM (Trusted Platform Module) 2.0 is a security chip (either physical or firmware-based) that provides hardware-level encryption for:

• Secure storage of passwords, encryption keys, and certificates
• Protection against malware and hacking attempts
• BitLocker drive encryption support
• Secure boot verification

Windows 11 requires TPM 2.0 to ensure better security against modern threats like ransomware and firmware attacks.

TPM 2.0 is available 2014. This means the motherboard should be 2014 or later in order to run Windows 11. 

How to install Windows 11 on unsupported PC

1. Ensure Windows 10 is activated (21H2 or later).

2. Download the Windows 11 ISO and mount it.

3. Open Setup.exe inside the ISO.

If blocked, open Command Prompt (Admin) and run:

setup /product server

This will bypasses compatibility checks.

4. Follow the installer to install Windows 11 on this unsupported hardware without TPM 2.0 and unsupported CPU.

To upgrade your unsupported PC to Windows 11 for free, despite the hardware not meeting the official requirements (notably the lack of TPM 2.0), you can try bypassing the hardware check during installation. Here's a step-by-step guide to help you install Windows 11 on unsupported hardware:

1. Create a Windows 11 Installation Media
2. Modify the Registry or Use a Registry Hack During Setup

* Boot from the USB installer.
* When the installer reaches the "This PC can't run Windows 11" screen, press Shift + F10 to open Command Prompt.
* Type regedit and press Enter to open the Registry Editor.
* In Registry Editor, navigate to:
     HKEY_LOCAL_MACHINE\SYSTEM\Setup
* Create a new key:
    Right-click on Setup, select New > Key, name it LabConfig.
* Inside LabConfig, create two DWORD (32-bit) values:
   BypassTPMCheck and set its value to 1.
   BypassSecureBootCheck and set its value to 1 (if needed).
* Close Registry Editor and Command Prompt.
* Continue with the installation process.
Note: For some builds, you might need to also bypass CPU checks. You can add:
    SkipTPMCheck = 1
    SkipSecureBootCheck = 1
    SkipCPUCheck = 1

3. Alternatively, Use a Registry File
To install Windows 11 on unsupported hardware. Some users create a .reg file with the bypass settings and run it during setup. Example content for bypass-windows11.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\Setup\LabConfig]
"BypassTPMCheck"=dword:00000001
"BypassSecureBootCheck"=dword:00000001
"SkipCPUCheck"=dword:00000001

Save the file, then run it during setup by pressing Shift + F10, typing regedit, and importing the .reg file.

4. Proceed with Installation
After applying the registry modifications, continue with the installation. The setup should now proceed without hardware check errors.

5. Post-Installation
    Once installed, you might need to disable or enable certain features.
    Keep in mind that updates or some features might not work properly.

Installing Windows 11 on unsupported hardware can pose several risks and challenges.
Unsupported hardware may not meet the minimum requirements, leading to crashes, freezes, or other stability problems. Microsoft may block updates or security patches for systems running Windows 11 on unsupported hardware, leaving your system vulnerable to security threats. Hardware drivers for unsupported systems might not be available or optimized, causing device malfunctions or reduced performance.

Missing security updates can expose your system to malware, ransomware, and other cyber threats. You might face difficulties with Windows activation or licensing, especially if modifications are detected. During installation or troubleshooting, there’s a risk of data loss if backups aren’t properly maintained. Installing Windows 11 on unsupported hardware may void warranties or support agreements from hardware manufacturers.

Installing Windows 11 on unsupported hardware can be challenging due to Microsoft's hardware requirements. Keep in mind that these methods may carry risks such as system instability, security vulnerabilities, or lack of official support, and they may violate Microsoft's terms of service.

1. Registry Hack:
Microsoft provides a way to bypass certain hardware checks via registry modifications, though this is somewhat known rather than obscure. It involves editing the registry key HKEY_LOCAL_MACHINE\SYSTEM\Setup\LabConfig and adding entries like BypassTPMCheck, BypassSecureBootCheck, and BypassRAMCheck set to 1.  

Note: This method is documented by Microsoft and considered a legitimate workaround, though it might not always work with all hardware configurations.

2. Using Custom Installers or Modified ISO Files:
Some users create or modify Windows 11 ISO files to include patches that bypass hardware checks. These are often shared in community forums or tech communities.  

3. Using Alternative Boot Methods or Unofficial Scripts:
Advanced users sometimes employ scripts or boot modifications (e.g., integrating patches into the installation media) to bypass hardware restrictions.  

4. Third-party Tools and Patches:
To install Windows 11 on unsupported hardware. Tools like "Universal MediaCreationTool" or community-developed scripts that modify the installation environment to bypass hardware checks. These are free but come with risks and are not officially supported.