Hi all, hoping someone can help, please!!

I've bought my son an Advent K100 laptop for his birthday (he has Aspergers and i needed a laptop with really good parental controls, one of his fascinations is computers!) with Vista home edition on.

I basically wanted to block the internet from him to start with, and not let him fiddle with any settings (like i have disabled the wireless card so he cant set internet up on his own), so i'm Administrator and dear son is a user.
I also ENABLED his options so that he can install his games and play them, but this ISNT happening-only I can play the games. I dont know what else to do.......whatever anyone suggests (fingers x'd please) i MUST have internet blocked.....dear son is a proper little hacker who understands these things better than I.
The ultimate result I want is for internet to be blocked from him, settings changing blocked from him, but him to be able to install and play his games. Any ideas? Thanks for reading, Emz xxx

I managed to do it by repeating my steps (each time with a reboot) and it worked on the fourth go, even though i hadnt done ANYTHING different. Have noticed with a couple of things that I've had to repeat the process in order to gain a result, is this like a Vista glitch or something? Have found the Vista tutorial on here very helpful. Also, I understand that updates for Vista are vital, so given that i've disabled dear sons internet, can i download (& save to memory stick) and install updates on MY laptop and install on his via memory stick? Would this work?