We broke through that thing so many times that the company gave us a refund and hired me as a "security contractor" to find ways around it. I found a few that they never figured out how to beat - for example opening a document in Word, typing some stuff, and telling the computer to shut down. Windows would shut down all of the other programs (including the computer time monitoring one) before it shut down Word. Word would come up with it's "save/don't save/cancel" prompt and you could just click "cancel." That was arguably my first foray into "hacking."