Change Registry to Install Windows 11 on Old Computer

Windows 11 has the requirement of 'Secure Boot' along with 'TPM 2.0' enabled.

However, if you are using a UEFI BIOS Mode machine, you can pretty straightforwardly bypass TPM on Windows 11. You simply have to go to BIOS settings and enable the 'Secure Boot' and 'TPM 2.0' options.

Unfortunately, if you have an old Legacy BIOS Mode, it is impossible for you to bypass Secure Boot on Windows 11 computer.

You can use the technical Registry way to bypass Secure Boot and TPM settings on Windows 11. Using registry, you can bypass Secure Boot and TPM requirements as follows:

1. Boot off of your Windows 11 install disk. 

2. Hit SHIFT + F10 to launch the command prompt when the above screen display. 

3. Type regedit and hit Enter to launch registry editor.

4. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\Setup. 

5. Create a new registry key under Setup and name it LabConfig. 

6. Within  LabConfig, create DWORDs values called BypassTPMCheck and BypassSecureBootCheck and set each to 1.

7. Close regedit and the command prompt.

8. Finally, close the Registry Editor and restart your computer to save all these new settings. Now, you have successfully bypassed Secure Boot and TPM 2.0 requirements on Windows 11.

9. You can also set up Windows 11 without internet - oobe\bypassnro