Ive had a lot of this with my five.........yes five.
the answer is to give them a separate computer to share and keep the main one for parents. Dont allow them to even look at it
I got mine a second hand job for 250quid
Now heres the rub. when they muck it up dont repair it for a couple of weeks, its amazing how they learn.
dont listen to
"I need it for coursework"
"I need it for homework"
"I need it for research at school"
and, any other guilt trips they fancy.
what they actually need it for is MSN chat, free music and screensavers with free trojans and viri
what a grumpy parent.
good luck with them