FG1

My son has killed the descktop pc. He is 8 years old but has been known to download games and alter things on the pc.
I don't know what he did yesterday but it would not reboot and said something about windows not being able to load due to something which I can't remember.
No worries I thought, I will just reset to an earlier date. It has been ok in the past when he has done similar.
No, I can't do that so I decide to use F11 and reset it to as it left the factory as there is nothing kept on it of any importance.

Now, halfway through trying to reset everything I have a green screen with the following:

A problem has been detected and windows has been shut down to prevent damage to your computer.
The problem seems to be caused by the following file : nv4_disp
If this is the first time you've seen this stop error screen, restart your computer. If this screen appears again, follow these steps.
The device driver got stuck in an infinate loop. This usually indicates a problem with the device itself or with the device driver programming the hardware incorrectly.
please check with your hardware device vendor for any driver updates.
Technical information
STOP 0x000000EA (0x8569FDA8, 0x85665B98, 0xF7A4DCBC, 0x0000001)
nv4_disp
begining dump of physical memory
physical memory dump complete
contact your system administrator or technical support group for further assistance.

Now, the pc is a few years old so I don't have a technical support group to turn to so...................

Oh mighty org, please help me sort out my lads pc.