Hiding user profiles

Hello all and happy holidays!

Right now I have 2 users on Vista each without Admin permissions. The problem is, when logged on to one of the accounts, I can still see the other user's folders and everything in it in the main drive. I took note that this wasn't present earlier on, but now it won't go away with the problem. We do however, know the password admin for whenever we want to install programs and such. I believe this might trigger it to automatically enable this feature?

Anyone have any clue as to what it could be? Might be an option, but I've tried researching that to no avail. Any help would be appreciated, and thanks.