Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.
Work through these checks
0 of 3 complete01Enter the recovery key from your Microsoft account (account.microsoft.com/devices)
Enter the recovery key from your Microsoft account (account.microsoft.com/devices).
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
02After logging in, temporarily disable BitLocker and reactivate
After logging in, temporarily disable BitLocker and reactivate.
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
03Make sure the BIOS Boot mode (UEFI/CSM) is left unchanged
Make sure the BIOS Boot mode (UEFI/CSM) is left unchanged.
Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.
Possible causes
- Hardware change (RAM, GPU, SSD) triggered TPM verification
- The BIOS update changed the PCR values of TPM
- Enabled Secure Boot has been disabled or changed
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