With the script running in the background, you can now trigger your update using one of these methods:
The script deletes or replaces the AppraiserRes.dll file or modifies the registry in real time. This action tricks the Windows installer into thinking the host computer meets all hardware requirements. How the Script Works
If a Windows Protected Your PC message appears, click More info > Run anyway .
on computers that do not meet Microsoft's official hardware requirements, specifically the Secure Boot 🛠️ How it Works
: With the script active, the Windows 11 Dynamic Update proceeds as if the PC were a brand-new, supported machine. The Legacy skip-tpm-check-on-dynamic-update.cmd
| Problem | Possible Cause | Solution | | :--- | :--- | :--- | | | The bypass wasn't active when the check ran, or security software blocked it. | Ensure you ran the script as administrator. Temporarily disable third-party antivirus/firewall, then re-run the script. Reboot your PC and try again. | | Error code 0x80004005 during Windows Update | This is a known quirk of the bypass mechanism. | Run the script again as administrator. It will say REMOVED . Then, without re-running, go back to Windows Update and check for updates. The upgrade should now proceed. | | Script runs but nothing happens | The system security features (e.g., Controlled Folder Access, Defender) may have blocked the registry change. | Check Windows Security history to see if the action was blocked. Add an exclusion for the script or temporarily disable real-time protection. | | Update fails late in the process (e.g., at 75%) | The ISO might be corrupted, or there is a deeper driver incompatibility. | Redownload the official ISO from Microsoft. Ensure all your current drivers are updated. | | "Windows 11 installation has failed" in Windows Update | The bypass is partially applied, but a dynamic update changed during the download. | Run the script to uninstall ( REMOVED ). Reboot. Run it again to re-install ( INSTALLED ). Then retry the update. |
In practice, Windows Update still delivers security patches (as of 2025). However, Microsoft could change this policy at any moment via a server-side block.
Before running any downloaded .cmd file, inspect it. A legitimate version contains commands like:
A: Usually, yes. Most users continue to receive monthly security updates. However, major feature updates (e.g., going from 23H2 to 24H2) may require you to re-run the script or reapply the registry hack, as these major updates often "reset" the system environment. With the script running in the background, you
When Windows 11 was announced, it brought a strict set of hardware requirements, most notably the need for . For millions of users with perfectly functional "legacy" PCs—from high-end gaming rigs of 2017 to reliable office workhorses—this felt like an artificial expiration date.
: Use this script if you have an older but high-end PC (e.g., a 2017 flagship laptop) that is running well. Ensure you have data backups and understand that you will be relying on community support rather than Microsoft if driver issues arise. For most users looking to upgrade one primary machine, the Rufus USB method or the registry edit may offer a more stable permanent solution. But for a quick, dynamic toggle that works with Windows Update directly, this script remains the gold standard in the Windows enthusiast community.
Before using the script, certain conditions must be met to ensure proper operation:
By bypassing TPM 2.0, you are losing hardware-based security features like BitLocker encryption keys stored in the TPM. on computers that do not meet Microsoft's official
When executed, it registers a lightweight system trigger or runs a continuous loop in the background.
In older versions of Windows Setup (21H2 and early 22H2), compatibility checks were partially handled by a file called appraiserres.dll . The script would locate the temporary setup folder (e.g., C:\$WINDOWS.~BT\Sources ), take ownership of this DLL, and replace it with a zero-byte or dummy file. Without the appraisal resources, the setup cannot determine if your TPM is missing.
Modifying operating system files carries risks. Back up your critical files to an external drive or cloud storage before proceeding. Step 2: Download the Script