Dear Sir/Madam,

I am facing a critical TPM-related issue on my desktop PC and would like your technical assistance.

System Details:

• Motherboard: Gigabyte B450M DS3H V2
• Processor: AMD Ryzen 7 5700G (Cezanne)
• BIOS: Older AGESA version (before ComboV2 1.2.0.F)
• OS: Windows 11

Observed Behavior:

• TPM / AMD fTPM is enabled in BIOS
• PC Health Check confirms TPM 2.0 is present and enabled
• However, in Windows:
• tpm.msc does not open
• “TPM Base Services” is completely missing from services.msc
• Event Viewer shows TPM hardware / attestation errors
• Measured Boot / Attestation fails
• Android emulators (MSI App Player / LDPlayer) crash with ntdll.dll errors

Error messages include:

• “The device driver for the Trusted Platform Module (TPM) encountered a non-recoverable error”
• “Pre-attestation health checks confirm a critical component has failed”

Important Note:

This same CPU worked perfectly with TPM and emulators on a different B450 motherboard (Maxsun), which indicates:

➡️ The issue is NOT hardware failure

➡️ It appears to be a known Windows 11 + older AMD AGESA TPM (fTPM) firmware bug

I noticed that newer BIOS versions with AGESA ComboV2 1.2.0.F mention:

• TPM-B firmware update
• Fix for TPM 2.0 vulnerabilities and stability issues

Before performing a BIOS update (due to unstable power conditions in my area), I would like confirmation from your technical team:

1. Is this a known AGESA / TPM firmware issue on B450 boards with Cezanne CPUs?
2. Will updating to AGESA ComboV2 1.2.0.F fully restore TPM Base Services in Windows?
3. Is there any risk to TPM hardware or Windows activation after the update?

Your guidance will help me proceed safely.

Thank you for your time and support.

Kind regards,

[Monerul islam]