Allow BitLocker without a compatible TPM" error mesage, can't encrypt c drive with BitLocker

Hello,

See if this fix helps you (works with Windows 11):

https://www.kapilarya.com/fix-this-device-cant-use-a-trusted-platform-module-for-bitlocker-in-windows-10

Let us know if this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.

Hi @Nick Coe

You can use Group policy or registry key to enable Bitlocker without TPM. But the user should have recovery key to restart his machine:

How to turn on Microsoft BitLocker Drive Encryption without a TPM (Trusted Platform Module)

https://admx.help/?Category=Windows_11_2022&Policy=Microsoft.Policies.VolumeEncryption::ConfigureAdvancedStartup_Name

Please don't forget to accept helpful answer

Hi Nick Coe Open the Registry Editor by pressing Win + R, typing regedit, and hitting Enter. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\TPM and check for an entry named OSAttr. If it's not there, create a new DWORD (32-bit) Value named OSAttr and set its value to 1.

Below are similar docs I found plz have a read.

https://learn.microsoft.com/en-us/windows/security/hardware-security/tpm/initialize-and-configure-ownership-of-the-tpm https://answers.microsoft.com/en-us/windows/forum/all/tpm-20-not-being-recognized-by-windows-11/2ca4cd49-5717-42e7-b89c-201f87dac41f

If this helps kindly accept the answer thanks much.