You had to beat level 1 and start level 2, and most people didn't because the anti-piracy was utterly brutal and would kick in at the transition from level 1 to 2, locking out even people who had legal copies.

(It would count any CD burning software being installed as meaning it was pirated, it also couldn't work properly on Windows 2000, and almost always detected as pirated on ANY NT kernel, most of the cracks didn't work either, since again you had to actually beat level 1 to find out if it thought you were a pirate, and a lot of crack teams didn't test that far)