Hi I just built a completely new PC and installed Windows 7 Home Premium 64bit. In the first 24 hours of having the PC, I had about 5 Kernel Power errors, which all resulted in a BSOD. I tested my RAM, and found out that it was faulty. I replaced it with another set, which seemed to do the trick: No more BSODs! Or so I thought. The PC ran fine for over 10 hours, and then suddenly it happened again. Here is the event log. Log Name: SystemSource: Microsoft-Windows-Kernel-PowerDate: 11/10/2009 9:52:32 AMEvent ID: 41Task Category: (63)Level: CriticalKeywords: (2)User: SYSTEMComputer: TempyDescription: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="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="2009-11-10T07:52:32.532415900Z" /> <EventRecordID>4068</EventRecordID> <Correlation /> <Execution ProcessID="4" ThreadID="8" /> <Channel>System</Channel> <Computer>Tempy</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> I have no idea what to do or what to search for. As said, the system is brand new with the exception of an old optical drive. Any help in this matter would be greatly appreciated! Thanks.

Hello Tempyy, First of all, remove all unnecessary hardware devices from the computer, try entering Windows safe mode to test whether it is a third-party software/hardware compatibility issue. If so, please download and run Windows 7 Upgrade Advisor to check the reason for the issue. If the issue is caused by some incompatible driver, you might go to Device Manager, right click your hardware device in the list and select Update Driver Software; then click Search automatically for updated driver software. If you still get the BSOD error after installing the latest driver, please understand that Windows system uses separated user mode and kernel mode memory space, stop errors are always caused by kernel portion components, such as a hardware device, third-party drivers, backup software or anti-virus services (buggy services). The system goes to a blue screen because there is some exceptions happened in the kernel (either the device driver errors or the service errors), and Windows implements this mechanism: When it detects some errors occur in the kernel, it will kill the box in case some more severe damage happens. Then we get a blue screen or the system reboots (it depends on what the system settings are). To troubleshoot this kind of kernel crash issue, we need to debug the crashed system dump. Unfortunately, debugging is beyond what we can do in the forum. A suggestion would be to contact Microsoft Customer Service and Support (CSS) via telephone so that a dedicated Support Professional can assist with your request. Please be advised that contacting phone support will be a charged call. To obtain the phone numbers for specific technology request please take a look at the web site listed below: http://support.microsoft.com/default.aspx?scid=fh;EN-US;PHONENUMBERS If you are outside the US please see http://support.microsoft.com for regional support phone numbers. I hope the problem will be resolved soon. Thanks! Andy

Hi Thanks so much for your help. I have not been able to run the Upgrade Advisor, as it never seems to establish a connection to the Microsoft server. However, I updated the drivers for my mouse and keyboard (Both Logitech products. I remember Windows warning me as I installed the old driver that it has compatibility issues) and I have not experienced a BSOD since. I have one more question, though. I downloaded a program called Driver Genius, which apparently found several new drivers for my hardware. When I go to the device manager and click Update Driver Software however, it tells me that the latest drivers are installed. An example would be Intel(R) 5 Series/3400 Series Chipset Family PCI Express Root Port 2 - 3B44 (And all other following ports). This driver is from 2006, and Driver Genius found an update of 2009. "Update Driver Software" cannot locate this driver, though. Does Windows not regard this driver as important, or does Driver Genius lie to the customers to boost sales? Once again, thanks for your help. Greatly appreciated!

Hi, To address this issue, Microsoft has published a knowledge base (KB) article: Windows Kernel event ID 41 error in Windows 7 or in Windows Server 2008 R2: "The system has rebooted without cleanly shutting down first". Click the following link to view the article in the Microsoft Knowledge Base: http://support.microsoft.com/kb/2028504 Regards,Magon Liu - MSFT