HPT can not use the laptop with it plugged into a wall, DHP is another story.
HPT draws power from the vehicle and the laptop, it's very possible to brick a computer and fry the MPVI doing it that way. HPT will not warranty or repair it if that happens.
Wait, what?
2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
2005 F350 6.0 - studded, deleted, tuned
2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold