Laptop TPM + PIN rejected after BIOS update

4.5

Your known PIN is no longer accepted after updating the laptop firmware.

Symptoms
  • "Incorrect PIN"
  • Locked out
  • Recovery required
Possible Causes
  • TPM PCR registers changed
  • TPM reset
  • BIOS bug

Step-by-Step Fix

1

Use Recovery Key

Enter the 48-digit key to get into Windows.

2

Reset PIN

Once in Windows, remove and re-add the TPM+PIN protector.

3

Check BIOS Settings

Ensure TPM/Secure Boot settings haven't changed.

When to See a Technician

BIOS updates often change the "Platform Configuration Registers" (PCRs), which breaks the TPM trust link.

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