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Windows 7: BSOD IRQL_NOT_LESS_OR_EQUAL (a) and BAD_POOL_HEADER (19)

30 Nov 2012   #1

Windows 7 Home Premium 64bit
 
 
BSOD IRQL_NOT_LESS_OR_EQUAL (a) and BAD_POOL_HEADER (19)

I have seen the IRQL BSOD twice now, and BAD_POOL once. About 4 other BSODs before I was willing to bet we have a persistent problem.

Any help is greatly appreciated.
Attached find zipped SF Diagnostic Tool files. This has the IRQL memory dump.

Thanks in advance,

Paul

My System SpecsSystem Spec
.

30 Nov 2012   #2

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64Bit
 
 

Welcome to SevenForums.

Code:
Start Menu\Programs\AVG	Public:Start Menu\Programs\AVG	Public
Start Menu\Programs\AVG 2012	Public:Start Menu\Programs\AVG 2012	Public
Running two antiviruses would create conflicts. Please uninstall AVG antivirus, it's known to contribute in crashes. Microsoft Security Essentials does not create such problems.

Recommended antivirus program for Windows 7 based on stability compared to others:-
Do not start the free trial of Malware Bytes; remember to deselect that option when prompted.

Run a full scan with both (separately) once downloaded, installed and updated.

Update the video card drivers:
Code:
Driver	c:\windows\system32\drivers\atikmpag.sys (8.14.1.6105, 191.00 KB (195,584 bytes), 4/6/2010 9:23 PM)
Click on the Start ► Control Panel ► Programs ► Uninstall a program ► Uninstall everything related to; ATI and restart the system. Delete remnants of its drivers/older drivers using Driver Fusion/Sweeper

Get the latest drivers from:
Run the System File Checker that scans the of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:
  • Click on the
  • Type CMD on Search
  • Left click and Run as Administrator
  • Type SFC /scannow
Full tutorial here:Run Disk Check on your hard disk for file system errors and bad sectors on it:Free up the start-up, nothing except the antivirus is usually needed.
*Let us know if the pc is stable or not
Then proceed with memtest:
Take memtest. Run for 8 passes and test each stick in a know good slot for an additional 6 passes.
Quote:
The goal is to test all the RAM sticks and all the motherboard slots.

Check your motherboard manual to ensure the RAM sticks are in the recommended motherboard slots. Some motherboards have very specific slots required for the number of RAM sticks installed.

If you get errors, stop the test and continue with the next step.

1. Remove all but one stick of RAM from your computer (this will be RAM stick #1), and run Memtest86 again, for 7 passes.
*Be sure to note the RAM stick, use a piece of tape with a number, and note the motherboard slot.
If this stick passes the test then go to step #3.

2. If RAM stick #1 has errors, repeat the test with RAM stick #2 in the same motherboard slot.
*If RAM stick #2 passes, this indicates that RAM stick #1 may be bad. If you want to be absolutely sure, re-test RAM stick #1 in another known good slot.
*If RAM stick #2 has errors, this indicates another possible bad RAM stick, a possible motherboard slot failure or inadequate settings.
3. Test the next stick of RAM (stick #2) in the next motherboard slot.
*If this RAM stick has errors repeat step #2 using a known good stick if possible, or another stick.
*If this RAM stick has no errors and both sticks failed in slot#1, test RAM stick #1 in this slot.
4. If you find a stick that passes the test, test it in all the other motherboard slots.

If Part 2 testing shows errors, and all tests in Part 3 show errors, you will need to test the RAM sticks in another computer and/or test other RAM in your computer to identify the problem.

In this way, you can identify whether it is a bad stick of RAM, a bad motherboard, or incompatibility between the sticks.
Errors are sometimes found after 8 passes.
Do this test overnight, before going to bed.

Good luck.
My System SpecsSystem Spec
01 Dec 2012   #3

Windows 7 Home Premium 64bit
 
 

Thanks, koolkat77!

Performed: RAM - Test with Memtest86+
  1. Found one of two memory boards defective: Crucial 4 GB DDR3-1333 UDIMM 240 Pin Memory
  2. The defective board produced over 500 errrors during a 4 minute test run, regardless of installation slot.
  3. The good board produced no errors.
  4. Note: I had poor luck using a USB drive based boot disk, and ended up burning a CD for Memtest86+
My System SpecsSystem Spec
.


01 Dec 2012   #4

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium 64Bit
 
 

Glad you found the cause.

Post back if you have any questions.
My System SpecsSystem Spec
Reply

 BSOD IRQL_NOT_LESS_OR_EQUAL (a) and BAD_POOL_HEADER (19)




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