What is best practice for using BitLocker on an operating system drive?
The recommended practice for BitLocker configuration on an operating system drive is to implement BitLocker on a computer with a TPM version 1.2 and a Trusted Computing Group (TCG)-compliant BIOS implementation, plus a PIN. By requiring a PIN that was set by the user in addition to the TPM validation, a malicious user that has physical access to the computer cannot simply start the computer.