Debugging :: Computer Rebooting When Running A Game

I have currently been experiencing a new problem with my PC. This problem occurs when I am running any game on my computer. When running a game for a few minutes, my tower begins to make a loud noise, which I assume is caused by the fans spinning faster and faster inside, then my display monitor goes black but then notifies me with a "no signal" message. While this is happening, my tower is still on as the power button still has back lighting, in fact the back lighting never disappears unless I physically have to turn my PC off.

I would say I have been experiencing this problem fairly recently - about a week ago this problem arose. The reboot only ever occurs when I am running a game and not when I am browsing the internet, watching videos, running other programs like Word or Skype etc...

The games I am running also had the video settings on high and I have noticed that when I put the video settings on low it buys me a little more time before my system reboots.

XML view
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>3</Version>

[code]...