Computer is getting blue,black, or grey screen

Every time I play SC2, league of legends, or World of Warcraft. My whole screen will turn black, blue or grey in about 5-10 minutes. I currently use a graphics driver for my 8800M GTS is a nvidia driver 7.15.11.6746. If I install the today's drivers from nvidia.com, My screen will turn blue or grey right at the windows login screen.
Here are the dmp files that were created last night when it crashed while on Starcraft II last night for about 15 minutes. I do not know how to give you the information on the list of drivers I currently have.

Hi,
Just checking if anyone has looked at my files.

Thank you for your help.

This is my events page at that time

- <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>2</Version>

<Level>1</Level>

<Task>63</Task>

<Opcode>0</Opcode>

<Keywords>0x8000000000000002</Keywords>

<TimeCreated SystemTime="2010-04-28T21:36:06.813216300Z" />

<EventRecordID>4552</EventRecordID>

<Correlation />

<Execution ProcessID="4" ThreadID="8" />

<Channel>System</Channel>

<Computer>Steve-PC</Computer>

<Security UserID="S-1-5-18" />

</System>


- <EventData>
<Data Name="BugcheckCode">0</Data>

<Data Name="BugcheckParameter1">0x0</Data>

<Data Name="BugcheckParameter2">0x0</Data>

<Data Name="BugcheckParameter3">0x0</Data>

<Data Name="BugcheckParameter4">0x0</Data>

<Data Name="SleepInProgress">false</Data>

<Data Name="PowerButtonTimestamp">0</Data>

</EventData>


</Event>




I also went to administrator tool and went to windows memory diagnostic and everything was fine on the test.