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Zachariahh's avatar
Zachariahh
Iron Contributor
Mar 12, 2025

How do I UPDATE (not upgrade) Windows 11 from 21H2 without TPM?

I installed Windows 11 on a non-TPM computer ages ago, using Rufus. But now I'm told my version 21H2 has reached end of service and when I try to update using the Windows11InstallationAssistant, it tells me TPM is needed. I already change the registry and rebooted as I found on this site:

Navigate to HKEY_LOCAL_MACHINE\SYSTEM\Setup.
Create a new registry key under Setup and name it LabConfig.
Within LabConfig, create DWORDs values BypassTPMCheck and BypassSecureBootCheck and set each to 1.

But it still detects this absence of TPM. How do I get past this? (without the hassle of ISOs and booting off other media), it must be possible.

2 Replies

  • OregonPine's avatar
    OregonPine
    Iron Contributor

    Please keep in mind that continuously running an OS version that bypasses security requirements like TPM may expose you to security vulnerabilities, and while it may work for now, future updates could change how updates are handled on non-compliant systems. 

  • Braylons's avatar
    Braylons
    Iron Contributor

    Go to Settings > Windows Update and see if there are any pending updates that you may not have installed. Sometimes updates can be released in phases.

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