Fixing a TPM BitLocker Key

System firmware updates amongst other boot changes can cause a TPM based Bitlocker key to become invalid. When you attempt to boot into windows you&rsquo;ll get a blue screen asking to unlock the drive. Hopefully you have a copy of your bitlocker recovery key. Sometimes you can find this on your microsoft account. Enter the key into the blue window and boot into windows. Now if you don&rsquo;t fix…