How to disable a deviant use of Virtualbox?

[Tiktak]

I posted "Trial version of any software does not expire, how?" on 25 Oct 2012 and this was locked.

I am posting the same problem again by a different approach. Please help.

My previous post was simplified and causing suspicion. I'll tell my story now.

I am a widow with two children, a boy 15 & a girl 12 .
The boy's average grade was A since his first grade.
Starting a year ago, his grade dropped to an average F. Why? He started an online game. And he didn't pay for the software. By utilizing Virtualbox, he and his classmates can use the trial version of the software again and again.

I couldn't believe it at first. Surfing Google a few days for helpful information, I came across with something like BY THE SAME TOKEN, VIRTUALIZATION LETS YOU USE TRIAL VERSIONS OF ALMOST ANY SOFTWARE AGAIN AND AGAIN ON THE SAME MACHINE.

I have to stop him from indulging himself in this self-destruction game. But he is very rebellious boy. I, therefore, plan to stop him by a skillful method, and that is, by interrupting and/or corrupting his use of Virtualbox. For this purpose, I need to know how Virtualbox works in this aspect.

That's why I did the last post causing suspicion. I'll ask for help in a different way this time.

Would anybody please be so kind as to provide some information regarding how to INTERRUPT OR CORRUPT OR DISABLE SUCH A DEVIANT USE OF VIRTUALBOX?

By the way, his host is a desktop with Win 7 Pro. and the guest is also so Win 7 Pro.(maybe, not sure.)

Thank you very much!

[Martin]

That has nothing to do with virtual box. They could do the same by reinstalling their physical PC. Using a virtual PC it is just easier/faster to reinstall a "clean" Windows which doesn't know about an earlier use of a trial software.

[Twisted Lucidity]

This is not a VBox question, this is a parenting question.

What he is probably doing is messing around with the date-time settings so the game never realises it's out-of-date; or he's taken a snapshot at a critical point and is holding other data (e.g. his score etc) somewhere else. I've not looked up the specifics, bust activity such as this has been rife for longer than VBox as been around. There's only really a few ways to stop it:
1) Block access to the game's servers (you can do this on your router)
2) Disable DHCP and stop the guest joinging the network (you can do this on your router, won't work if he uses NAT)
3) Take control of your son's computer (I am assuming you paid for it) and make sure he only has restricted access to it (i.e can only use it when you are around)

Have you considered that fact that the gaming may not be the cause of his drop in grades, but is a coping mechanism for whatever the problem actually is? Escape into fantasy is a way people often deal with issues. You could try talking to him (I said talking, not confronting).

I think you have much bigger problems than simple VBox misuse and I would advise you to seek help through local channels (e.g. school, social services, community groups, friends, charities etc). We can only really give technical advice here, but any measure you take can be circumvented if your son is technically astute.