Skip-tpm-check-on-dynamic-update.cmd

The infamous appraiserres.dll file contains the logic for:

The script replaces the dynamically downloaded version of appraiserres.dll with a modified or empty version that returns "compatible" for all checks. Because the batch file acts during the update, the new file is swapped before the setup engine executes the hardware scan.

Without a functional TPM, you cannot use BitLocker drive encryption on system drives. Windows 11 Home’s "Device Encryption" also fails silently.

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.

Many users fail to upgrade because they follow guides that involve altering the registry after the setup is already running. However, Windows 11 Setup is programmed to re-evaluate compatibility after downloading the Dynamic Update. The Dynamic Update contains updated sdb (Shim Database) files and dll appraisal files.

Consider this scenario:

skip-tpm-check-on-dynamic-update.cmd is designed to run after the files are downloaded but before the appraisal service executes. It either deletes the downloaded appraisal files or neuters the process that validates the TPM.

No bypass script is without consequence. Here are the critical risks.

While the exact source code of various versions floating around GitHub and tech forums may vary, the core logic of skip-tpm-check-on-dynamic-update.cmd relies on two primary techniques:

System administrators managing fleets of older but reliable hardware (e.g., thin clients, industrial PCs) can use this script to automate in-place upgrades from Windows 10 to Windows 11 without touching every machine manually.

After installation, you can check whether the bypass was effective: