Bitlocker Drive Encryption Startup Group Policies
If you are trying to encrypt a volume in Windows 7 or Windows 8 and get the message “This device can’t use a Trusted Platform Module” you need to modify some Windows startup policies first.

The error message:
This Device Cant Use A Trusted Platform Module

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“This device can’t use a Trusted Platform Module”. Your administrator must set the “Allow BitLocker without a compatible TPM” option in the “Require additional authentication at startup” policy for OS volumes.”

Solution: Startup Policies

1. Step Open up the policy editor that is included on certain Windows 8 versions. If you do not know how to open it, please read our tutorial how to edit group policies in Windows 8

2. Step Uncollapse the path Administrator Templates, Windows Components, BitLocker Drive Encryption, Operatin System Drives

Bitlocker Drive Encryption Startup Group Policies

3. Step Make sure to select the Enabled radiobox and select the checkbox “Allow BitLocker without a compatible TPM (requires a password or a startup key on a USB flash drive)

Require Additional Authentication At Startup

4. Step Click on Apply and you should now be able to use BitLocker on your hard drive after a restart!

5. Step Restart

6. Step Use the disk tools to encrypt your hard drive