Originally posted here by Und3ertak3r
there are stand alone tools to run from cd or Jump drive to extract passwords from chached files..
Hm...yeah, there are, but even using 350MB rainbow tables it will take at least a couple of minutes to crack the system passwords. And he would have heard something being plugged in, or a CD drive open...

Anyway, next time, don't let the guy on your computer - he obviously knows enough to discover your password, so you just want to secure yourself a bit more and change your password every couple of weeks. And deny him physical access to your PC

Cheers,

-jk