Windows 7 randomly crashes.

I am running Windows 7 Rc on a new PC which I built up as a media centre. Whilst I can say it looks great I am experiencing several blue screen crashes per day and sometimes the Pc will freeze and force a reset. This is a new install of windows 7 as previously it got so bad I reformatted and started again. In my event log I get the following critical errors occuring randomly I cannot establish a pattern but suspect it may be a problem with IE8. wondering if anybody else is getting similar issues, I cant wait for the official release and hopefully a service pack to address some of the stability issues. At the momnet it is like the early days of Vista nightmare revisited. I am starting to think about uninstalling programs starting with the Windows Live program suite but the problem is so random its hard to pin down.

Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 19/09/2009 9:18:57 PM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
<Event xmlns="">
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<TimeCreated SystemTime="2009-09-19T11:48:57.718018000Z" />
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Security UserID
<Data Name="BugcheckCode">197</Data>
<Data Name="BugcheckParameter1">0x1003ed</Data>
<Data Name="BugcheckParameter2">0x2</Data>
<Data Name="BugcheckParameter3">0x1</Data>
<Data Name="BugcheckParameter4">0x82d32067</Data>
<Data Name="SleepInProgress">false</Data>
<Data Name="PowerButtonTimestamp">0</Data>

I have been having this same problem on the RTM and earlier releases :( What kind of a video card are you running by chance? I have a ATI 4870 and am seeing a lot of other people with ATI cards having this same problem.

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