As I mention on the other thread, I could believe Asus or Acer or some other cheap laptop disabling it because of gaming performance or whatever, but not the big brands.

I am quite familiar with HP itself, and in fact as I linked on the other thread they publicly claim that _all_ their laptops have Bitlocker enabled by default. Lenovo is the laptop of TFA, so they are definitely doing Bitlocker on their enterprisey laptops. My Dell Inspiron 5510 came with Bitlocker on out of the box, and perusing the Dell support site having articles about Bitlocker recovery as early as the WD15 docking station era, I am sure they are enabling it by default too.