As the Admin, you can do anything but backdoor an account.  You can change his password and I would advise reading a little on Group Policy so you can disabel his ability to chnage the password.

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@matthew53214 wrote:

Hey, I have a teenage son who created his own account.  He is a limited user, but has it password protected.  I am afraid of what he may be doing on the computer, as he hought a webcam awhile back and I found some of his videos.  My question is, as the administrator, is there any back door way of looking into his account without him knowing it.  I know I can change his password all together, but then he will know that I was in his account.  Or, can anyone think of a way to justify me going in there?!!?!?

Thanks for any help!

Concerned Parent

Justify?  You're the parent, he's the child...  My two boys have a very nice Dimension 8300.  Ground rules are that email is on the parent's computer.  Their computer is not allowed to download anything w/o parental permission, it is used in a room in plain view from the kitchen and family room.  IM is not allowed for the 11 year old, but the 17 year old can do it - although it's currently disabled due to college applications and SATs. 

Ground rules have to exist.