Stress_Daddy,
heck of a way to show your step-son you believe in him...
as a step-son myself, if i found out (and believe me... you catch him, and ground him, he'll know) you will NEVER be trusted by him...
i'll agree the internet is full of wierdo's... just look at tek-tips

... a great group of wierdos here, but wierdos just the same...
he gave you his word... if you can't accept that, then TELL him you don't trust him... don't spy... show your integrity, and sit down and tell him that you are having problems believing him...
a 31 year old father of 3, myself... oldest almost 7... they each have their own computers... they KNOW i check their computers... i TELL them i will be doing random spot checks... they accept that, and (i hope) appreciate that i care enough to give them their space...
yes... there are TONS of applets out that can do what you are trying to do... but, trust me, you will sabotage ANY chance of a meaningful relationship with your step-son.
Trust: it takes a lifetime to gain and keep, and a split-second to lose forever... Shane
and now for the impressive abbreviations:
DOA, SOL, AWOL, PEBKAC, id10t, FUBAR