Can't identify BSOD

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Basils57

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Feb 16, 2005
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I'm running Win7 Home premium 32 bit, and am having my computer crash with BSOD every couple of days. The problem is the blue screen just flashes on, and then the comp. restarts before I can identify the error.
Any ideas how I can identify the problem please?
 
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Please follow this guide to attach your minidump files to your next post.

First locate your minidump files, they are usually found by clicking on your C: drive, in Windows Explorer, then click on Windows to view the contents. If your operating system is installed under a different drive letter then look there. They should be stored under a file called minidump.The files will have a .dmp extension.
Zip up at least 6 of the most recent files into one zip folder and save on your desktop (if there are less then just zip up what you have).
NOTE To zip up a file in Windows (all versions). Right-click the file or folder, click on Send To, and then click Compressed (zipped) Folder and save it to your desktop.
Open Windows Explorer, click on Desktop in the left column so you can see the zip file. In the left column click on C: > Windows > Minidump and then drag & drop any additional .dmp files into the zip folder.


• Below the Message Box click on Go Advanced. Then scroll down until you see a button, Manage Attachments. Click on that and a new window opens.
• Click on the Browse button, find the zip folder you made earlier and doubleclick on it.
• Now click on the Upload button. When done, click on the Close this window button at the bottom of the page.
• Enter your message-text in the message box, then click on Submit Message/Reply.
 

Basils57

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Joined
Feb 16, 2005
Messages
127
Thanks Mark1956; there was nothing in the minidump file, so I have changed the settings in 'Startup & Recovery' to write to small memory dump.
If it's of any help, the event viewer provided the following:

Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 10/12/2011 15:45:07
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
User: SYSTEM
Computer: Barry-PC
Description:
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="2011-12-10T15:45:07.130462600Z" />
<EventRecordID>675461</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>Barry-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>

So now do I have to wait until I have another incident before I can take any action?
 
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Aug 1, 2003
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51,988
Set it for a kernel memory dump instead of small. They are still small enough to upload but have more information.

Any new drivers installed lately, or software that installs drivers?

Anything the seems to prompt the blue screen? Ventilation good, vents clear, and fans turning?
 

Basils57

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Feb 16, 2005
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127
OK I've set it for kernel memory dump, and in the meantime have had a BSOD and am attaching a copy of the minidump file.

Re drivers; the only one I have installed was since this problem occurred, and fans are working fine, vents are clear and I have moved my tower to give it more ventilation.
 

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This could be a bad driver but most likely memory, the minidump does clearly state "Memory Corruption".

Run a test on your memory as follows:

Preliminary checks
You should first check the model of RAM stick that you have on the manufacturers site for the recommended voltage setting and then make sure it is set correctly in the PC's Bios. An incorrect voltage setting may be the reason for your problems so test the PC's performance again if the voltage was incorrect.
Errors can also be caused by dirty contacts, mismatched sticks or using them in the wrong slots. Check all sticks are the same make and specification, check the motherboard manual for the correct slots to use. Remove all the sticks and clean the contacts with a soft pencil eraser and blow out the slots with a can of compressed air.
Download Memtest86+ from here
When the download is complete right click the file and select Extract Here and burn the image to a CD.
In windows 7 right click the extracted file, select Open With, then select Windows Disc Image Burning Tool then follow the prompts. For all other versions of windows (if you do not have an ISO burner) download this free software. ImgBurn
Install the program and start the application. Select the top left hand option to burn image file to disk and then on the next window click on the small yellow folder icon and browse to the ISO file you have downloaded. Then click on the two grey discs with the arrow in between (bottom left) and leave it to complete the operation.
Testing
Boot the PC into the Bios setup and set the CD/DVD drive to 1st in the boot sequence. Insert the disk in the drive then reboot and the disc will load into dos. Leave the test to run through at least 8 cycles or until it is showing some errors. If errors show in the test, remove all but one of your RAM sticks and repeat the test on each stick until you find the one that is faulty. This is a long slow test and should ideally be run overnight.
The memtest will not be 100% accurate but should easily detect any major faults.
IMPORTANT
Always disconnect your PC from the mains supply when removing Ram sticks and earth your hands to discharge any static electricity to avoid damage to sensitive components. If performing this test on a laptop PC you should also remove the battery before removing or replacing the RAM sticks.
 
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The dump file was a mixed blessing. It identified the error as:

0x0000004E: PFN_LIST_CORRUPT
This indicates that the memory management Page File Number list is corrupted. Can be caused by corrupt physical RAM, or by drivers passing bad memory descriptor lists. It is not likely that bad RAM is at fault.

This was probably caused by the following module: ntkrpamp.exe (nt!KeBugCheckEx+0x1E)
A standard Windows kernel file, so the dump was not too informative.

But, to eliminate the obvious, try a RAM test first. If that comes out OK, then the error is probably due to bad data transferred from a driver.

Is there anything in particular that you are doing at the time of these crashes, any program usually open, or anything like that?

Memory Testing (including bootable CD's and floppies):

Memtest86
MemScope (Floppy and CD images.)
Roadkil's RAM Test
Microsoft Memory Test (floppy or CD ISO image)

If you have enough memory sticks, you can test them by removing one at a time and see if the problem disappears.

If you are running Vista or 7, tap F8 on boot and choose the memory diagnostic, or if you can boot up, go to Start > Search and type:

mdsched.exe

Choose to run a memory diagnostic on next boot. Or, you can boot from the DVD and run it from there.
 

Basils57

Thread Starter
Joined
Feb 16, 2005
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127
Sorry Guys, but having downloaded Memtest86, what exactly am I burning to CD?
 
Joined
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If you follow the guide I gave in post 6 for Memtest86+ it should be fairly clear. Anything you do not understand please do ask.
 

Basils57

Thread Starter
Joined
Feb 16, 2005
Messages
127
Guys, sorry for the delay in replying, but I have been holding back to see if I got a recurrence and I haven't - so far.
I don't know what's happened, but along the way with the tests etc, somehow it seems to have been sorted; don't ask me how!
I'll keep my fingers crossed.

Thanks for all of your time and help, it really is appreciated.
 
Joined
May 7, 2011
Messages
14,142
Ok, thanks for letting us know, any return of the problem post your minidumps and run the memtest.
 
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