Sans has a writeup on Windows local privilige escalation using the Windows scheduler and among other things it might be worth starting out by saying that typically, only Administrative group users in Windows XP are allowed to access the Windows Scheduler. However, I have read reference of some installs that even give guests that capability. If that’s a default setting under some install profile – this is a big problem, if it’s just because the administrator chose to make the scheduler accessible to everyone it’s LESS of a problem, but still worth KNOWING about.