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Bitlocker Auto-Unlock C drive with TPM

jm flag

I wanted to enable auto-unlock on C drive with TPM. When I click on enable bitlocker on C Drive, it shows me only 2 options

  • Insert a USB drive
  • Enter a password

I do not see any option which says

  • Let bitlocker automatically unlock my drive.

I have enabled the Group Policy Require additional authentication at startup.

I have enabled TPM at hardware level as well.

Please help.

in flag
For completeness, can you update your post with output from `Get-Tpm`
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jm flag

I was able to resolve it on my own. The issue was my C drive was in MBR partition type. I had to convert it to GPT partition type and change the BIOS to UEFI mode, followed by a restart and it worked.

mangohost

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