Bitlocker Drive Encryption on Dell Computers


Question

I'm having problems with Bitlocker drive encryption not storing the key on TPM on my Dell computer. Windows is not relinquishing ownership of the TPM chip in order to store the Bitlocker key; therefore, Bitlocker drive encryption is failing  on my Dell computer with one of the following model numbers:

Answer

Clear the TPM by following the instructions at Dell's wiki page: How To Change TPM Modes 1.2<->2.0 under the 2. Clearing the TPM: heading.

Also review and follow the directions in the section 2.1. A note regarding automatic ownership of TPM: to temporarily disable automatic ownership of TPM.