I was playing around with XP the other day, when I found a directory that I didn't realize was on the machine. It appears it came with Windows, because I sure as hell didn't put it there. Following the path:
C:\Documents and Settings\All Users\Start Menu\Programs\Games
...there's a hidden folder called NBA. Clicking into the NBA folder, it initially looks empty, but there is, again, a group of 32 hidden folders inside that. When I clicked on the CHA folder, I found a series of executable programs. The most interesting ones look like bloxshotz.exe, thr33z.exe, dunxz.exe, st34lz.exe, contestshotz.exe, and something called rufus12minz.exe. There are about 300 programs in each of those hidden folders.
I'm a little worried to run any of them, but I'll ask around and see what I can find. I'm estimating I'll be confident enough to see what they do by about... oh... the end of October.