Hey everybody,

1st time poster, been having a noticeable problem since November 4th according my reliability monitor. I don't know if its being caused by an MS update - there was an IE update installed on Nov 4 - or what but I wasn't the one installing anything on that day or since the problem started.

Problem: If I leave my computer idle for 10-20 minutes, it hard shutdowns. The power light on my notebook looks like its in sleep mode (slow orange flash) but when I hit the power button it boots up and asks if I want to start windows normally.

Here are the main specs (ordinary stuff - just for school purposes):
make/model: Toshiba notebook
Processor: AMD Athlon X2 Dual-Core 2 GHz
Ram: 4 GB
OS: Vista home premium SP2
System type: 64-bit

Here is the XML of a recent event that I'm sure was a hard shutdown:
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-Diagnostics-Performance" Guid="{cfc18ec0-96b1-4eba-961b-622caee05b0a}" />
<EventID>100</EventID>
<Version>1</Version>
<Level>1</Level>
<Task>4002</Task>
<Opcode>34</Opcode>
<Keywords>0x8000000000010000</Keywords>
<TimeCreated SystemTime="2009-11-09T13:54:09.222Z" />
<EventRecordID>1277</EventRecordID>
<Correlation ActivityID="{00000001-0000-0000-51AB-EEBE4361CA01}" />
<Execution ProcessID="1776" ThreadID="1900" />
<Channel>Microsoft-Windows-Diagnostics-Performance/Operational</Channel>
<Computer>Andre-PC</Computer>
<Security UserID="S-1-5-19" />
</System>
- <EventData>
<Data Name="BootTsVersion">2</Data>
<Data Name="BootStartTime">2009-11-09T13:51:32.749Z</Data>
<Data Name="BootEndTime">2009-11-09T13:54:06.570Z</Data>
<Data Name="SystemBootInstance">148</Data>
<Data Name="UserBootInstance">130</Data>
<Data Name="BootTime">137721</Data>
<Data Name="MainPathBootTime">50075</Data>
<Data Name="BootKernelInitTime">25</Data>
<Data Name="BootDriverInitTime">19698</Data>
<Data Name="BootDevicesInitTime">11702</Data>
<Data Name="BootPrefetchInitTime">59494</Data>
<Data Name="BootPrefetchBytes">674684928</Data>
<Data Name="BootAutoChkTime">0</Data>
<Data Name="BootSmssInitTime">8423</Data>
<Data Name="BootCriticalServicesInitTime">1538</Data>
<Data Name="BootUserProfileProcessingTime">553</Data>
<Data Name="BootMachineProfileProcessingTime">604</Data>
<Data Name="BootExplorerInitTime">4114</Data>
<Data Name="BootNumStartupApps">14</Data>
<Data Name="BootPostBootTime">87646</Data>
<Data Name="BootIsRebootAfterInstall">false</Data>
<Data Name="BootRootCauseStepImprovementBits">0</Data>
<Data Name="BootRootCauseGradualImprovementBits">0</Data>
<Data Name="BootRootCauseStepDegradationBits">0</Data>
<Data Name="BootRootCauseGradualDegradationBits">0</Data>
<Data Name="BootIsDegradation">false</Data>
<Data Name="BootIsStepDegradation">false</Data>
<Data Name="BootIsGradualDegradation">false</Data>
<Data Name="BootImprovementDelta">0</Data>
<Data Name="BootDegradationDelta">0</Data>
<Data Name="BootIsRootCauseIdentified">false</Data>
</EventData>
</Event>

I'm not the most computer savy person in the world but I know how to read and take direction in order to troubleshoot. If anyone out there has seen this problem before and can offer some solutions, I'd be very appreciative.

Thanks all.