[win7]Random crashes- Sleep mode?

[El_Commi]

Hey guys.
Just wondering if its normal for windows 7 to crash in sleep mode?

Basically I was at work for most of the day, but my girlfriend was at home. I told her not to turn the computer off as I was downloading something. When she woke up she told me the computer was off.

I assumed it was just sleep mode, but she was sure it wasn't. So, I told her not to worry, and just said to leave it on when she leaves.
Anyway I came home around 1900 and it was off again. So checked event viewer.

- <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="2011-05-11T17:49:15.000416600Z" />
<EventRecordID>13620</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>ElCommi-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">true</Data>
<Data Name="PowerButtonTimestamp">0</Data>
</EventData>
</Event>

Well, as you can see it's crashed in sleep mode. I've had 3 of these in 2 days apparently, all 3 in sleep mode. All 3 looking fairly similar. Having checked with everyone at home. We haven't run out of electricity, 'nor faced any power cuts/surges etc.
So wondering if this is a sign of a deeper problem, or if I should just leave sleep mode off from now on.

I played Eve for about 2 hours, then some WoW arena and a bit of Crysis 2 mp. Before heading to bed to watch a movie. So about 4-6 hours of solid usage, and no obvious issue.

 

[El_Commi]

Ran 2 sets of 'IntelBurn tests'. One on standard, the other on maximum.
Here's the results of maximum.

Runs very hot, but it's not overclocked and using stock fan (upgrading those soonish). But the test completed, w/o any errors or crashes. Begining to suspect its definitely related to Sleep mode.
Disabled it for the time being, and will monitor.
Makes me sad though :<