This is because of copy protection. To play back a Blu-ray and project it, all of his hardware has to be compatible with HDCP copy protection. Anything in the chain will throw it off. Leo says that unless the laptop has an HDMI connection, it's likely that it won't support it. In fact, Powerlight is largely for powerpoint presentations. Another thing to try is turning off hardware acceleration. He could try the mirroring feature with the projector as the primary display.