first, make sure tha u have tight security cuz he cud act before you and install a keylogger or somfin, its not that easy but who knows......
mayb u cud just monitor all your incomin outgoin traffic [sniff], check what websites that guy go on! lol next day when u see him u can jus say "hey u enjoyed tha porno u watched last nite on " " web site"... u can do more than tha lol
a heard Wireshark or Ethereal can do tha kinda stuff lyk monitoring! but erm u on vista :x ...
read it ere m8:
am nt rely sure if they wud work on vista tho!