>How can I disable his access to the printer. Either by
Start -> "Printers and Faxes" -> Select the icon of the
printer you want to disable and right click ->
Select "Properties" -> Select "Security" tab
Now, select your son's username in the top box. In the
box below, you will see the current permissions for his
account. On the line "Print", tick the box "Deny". Don't
change anything else. Press "Apply", and then "Ok".