Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Frequent BSD IRQL Not less or equal and Bad pool header

18 Feb 2015   #1

Windows 7 Home Premium 64bit
Frequent BSD IRQL Not less or equal and Bad pool header

From what I've noticed there isn't much of a pattern of when it happens, except that it happens when my pc is working on a lot of processes. Several times it's happened while playing League of Legends. It started on the 15th and on the 17th it crashed multiple times. From what I understand it is a bad driver, but I haven't installed any new hardware in weeks and I don't see any issues in the device manager.

My System SpecsSystem Spec
18 Feb 2015   #2

Microsoft Community Contributor Award Recipient

Windows 10 Home 64Bit

Welcome to the forum.

Please check for an update for this driver: Driver Reference Table


Microsoft (R) Windows Debugger Version 6.3.9600.16384 X86
Copyright (c) Microsoft Corporation. All rights reserved.

Loading Dump File [C:\Users\YUSRA\Downloads\AARON-HP-Wed_02_18_2015__00553_86\021715-43103-01.dmp]
Mini Kernel Dump File: Only registers and stack trace are available

************* Symbol Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       SRV*c:\symbols*
Symbol search path is: SRV*c:\symbols*
Executable search path is: 
Windows 7 Kernel Version 7601 (Service Pack 1) MP (2 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS Personal
Built by: 7601.18717.amd64fre.win7sp1_gdr.150113-1808
Machine Name:
Kernel base = 0xfffff800`02e1b000 PsLoadedModuleList = 0xfffff800`0305f890
Debug session time: Wed Feb 18 06:06:43.036 2015 (UTC + 6:00)
System Uptime: 0 days 0:04:34.534
Loading Kernel Symbols

Press ctrl-c (cdb, kd, ntsd) or ctrl-break (windbg) to abort symbol loads that take too long.
Run !sym noisy before .reload to track down problems loading symbols.

Loading User Symbols
Loading unloaded module list
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *

Use !analyze -v to get detailed debugging information.

BugCheck 19, {21, fffffa8003d1c000, 7810, 0}

*** WARNING: Unable to verify timestamp for rtwlanu.sys
*** ERROR: Module load completed but symbols could not be loaded for rtwlanu.sys
Probably caused by : rtwlanu.sys ( rtwlanu+122fd )

Followup: MachineOwner

0: kd> !analyze -v
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *

The pool is already corrupt at the time of the current request.
This may or may not be due to the caller.
The internal pool links must be walked to figure out a possible cause of
the problem, and then special pool applied to the suspect tags or the driver
verifier to a suspect driver.
Arg1: 0000000000000021, the data following the pool block being freed is corrupt.  Typically this means the consumer (call stack ) has overrun the block.
Arg2: fffffa8003d1c000, The pool pointer being freed.
Arg3: 0000000000007810, The number of bytes allocated for the pool block.
Arg4: 0000000000000000, The corrupted value found following the pool block.

Debugging Details:

BUGCHECK_STR:  0x19_21

POOL_ADDRESS: GetPointerFromAddress: unable to read from fffff800030c9100
GetUlongFromAddress: unable to read from fffff800030c91c0
 fffffa8003d1c000 Nonpaged pool



PROCESS_NAME:  GetPopupInfo.e


ANALYSIS_VERSION: 6.3.9600.16384 (debuggers(dbg).130821-1623) x86fre


LAST_CONTROL_TRANSFER:  from fffff80002fc49c2 to fffff80002e8fec0

fffff800`00ba0158 fffff800`02fc49c2 : 00000000`00000019 00000000`00000021 fffffa80`03d1c000 00000000`00007810 : nt!KeBugCheckEx
fffff800`00ba0160 fffff880`014ab845 : 00000000`00000000 fffffa80`03d1c094 00000000`37383138 00000000`00000000 : nt!ExFreePool+0xa5a
fffff800`00ba0210 fffff880`074962fd : fffff6fb`7ea000f0 fffff6fd`4001e8e0 fffffa80`03d1c018 000a41f8`0613be00 : ndis!NdisFreeMemory+0x15
fffff800`00ba0240 fffff6fb`7ea000f0 : fffff6fd`4001e8e0 fffffa80`03d1c018 000a41f8`0613be00 fffffa80`066f5e40 : rtwlanu+0x122fd
fffff800`00ba0248 fffff6fd`4001e8e0 : fffffa80`03d1c018 000a41f8`0613be00 fffffa80`066f5e40 fffff880`074a01f3 : 0xfffff6fb`7ea000f0
fffff800`00ba0250 fffffa80`03d1c018 : 000a41f8`0613be00 fffffa80`066f5e40 fffff880`074a01f3 fffffa80`03d1c018 : 0xfffff6fd`4001e8e0
fffff800`00ba0258 000a41f8`0613be00 : fffffa80`066f5e40 fffff880`074a01f3 fffffa80`03d1c018 fffff800`0000091c : 0xfffffa80`03d1c018
fffff800`00ba0260 fffffa80`066f5e40 : fffff880`074a01f3 fffffa80`03d1c018 fffff800`0000091c fffffa80`03d1c018 : 0x000a41f8`0613be00
fffff800`00ba0268 fffff880`074a01f3 : fffffa80`03d1c018 fffff800`0000091c fffffa80`03d1c018 fffffa80`0602fffc : 0xfffffa80`066f5e40
fffff800`00ba0270 fffffa80`03d1c018 : fffff800`0000091c fffffa80`03d1c018 fffffa80`0602fffc fffffa80`066f5e40 : rtwlanu+0x1c1f3
fffff800`00ba0278 fffff800`0000091c : fffffa80`03d1c018 fffffa80`0602fffc fffffa80`066f5e40 fffff880`074c571a : 0xfffffa80`03d1c018
fffff800`00ba0280 fffffa80`03d1c018 : fffffa80`0602fffc fffffa80`066f5e40 fffff880`074c571a 00000000`00000000 : 0xfffff800`0000091c
fffff800`00ba0288 fffffa80`0602fffc : fffffa80`066f5e40 fffff880`074c571a 00000000`00000000 00000000`00000000 : 0xfffffa80`03d1c018
fffff800`00ba0290 fffffa80`066f5e40 : fffff880`074c571a 00000000`00000000 00000000`00000000 fffffa80`03d1c018 : 0xfffffa80`0602fffc
fffff800`00ba0298 fffff880`074c571a : 00000000`00000000 00000000`00000000 fffffa80`03d1c018 00000000`00000000 : 0xfffffa80`066f5e40
fffff800`00ba02a0 00000000`00000000 : 00000000`00000000 fffffa80`03d1c018 00000000`00000000 fffffa80`06029000 : rtwlanu+0x4171a


fffff880`074962fd ??              ???


SYMBOL_NAME:  rtwlanu+122fd

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: rtwlanu

IMAGE_NAME:  rtwlanu.sys


FAILURE_BUCKET_ID:  X64_0x19_21_rtwlanu+122fd

BUCKET_ID:  X64_0x19_21_rtwlanu+122fd


FAILURE_ID_HASH_STRING:  km:x64_0x19_21_rtwlanu+122fd

FAILURE_ID_HASH:  {0f332ab0-4cd5-3625-918e-fed8b5187c4f}

Followup: MachineOwner

0: kd> lmvm rtwlanu
start             end                 module name
fffff880`07484000 fffff880`0759a000   rtwlanu  T (no symbols)           
    Loaded symbol image file: rtwlanu.sys
    Image path: \SystemRoot\system32\DRIVERS\rtwlanu.sys
    Image name: rtwlanu.sys
    Timestamp:        Wed Feb 01 14:10:38 2012 (4F28F37E)
    CheckSum:         00103823
    ImageSize:        00116000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
My System SpecsSystem Spec
18 Feb 2015   #3

Windows 7 Home Premium 64bit

So I got the tool, and found the outdated driver, what is the other link for?
My System SpecsSystem Spec

19 Feb 2015   #4

Windows 7 Ultimate x64

Upgrade the outdated driver.
My System SpecsSystem Spec

 Frequent BSD IRQL Not less or equal and Bad pool header

Thread Tools

Similar help and support threads
Thread Forum
BSOD help (bad pool header & irql less or not equal)
Hello, I have a new pc: CPU: Intel Core i7 4770 SSD: Samsung 840 EVO 120 GB HDD: Western Digital caviar blue 1TB Memory: G.Skill 4X4GB GPU: Zotac GTX760
BSOD Help and Support
BSOD on 2 seperate pc's. Bad pool header and Irql less than or equal 2
Hello everyone! This is my first post here so bare with me. My friend is having some bsod problems and it seems to be triggered by flash (youtube) and torrenting. I have attached the log indicated by your bsod instructions. I hope i did that right im not 100% sure. Not only that my pc is having...
BSOD Help and Support
Frequent BSODs on Win 7 64 bit, 'bad pool header'
Hi guys. I've been experiencing a lot of BSODs recently on Windows 7 64 bit, often when browsing the web. I initially thought it was a problem with Chrome, but it's now happening whilst using Firefox also. I also get a BSOD most times I shut down/restart. I've not noted all of the error...
BSOD Help and Support
Frequent BSOD. First Bad Pool Header and now IRQL Not less or Equal
When using verifier I kept getting the BSOD at the start stating that my drivers were messed up. However without verifier I can usually boot but I get a frequent BSOD. The most recent one stated IRQL Not Less or Equal. If anyone can point out which driver might be the one causing this it would be...
BSOD Help and Support
BSOD mostly MEMORY_MANAGEMENT also sometimes IRQL & bad pool header
So ive been getting BSOD once or twice a day with almost always the message: MEMORY_MANAGEMENT I did windows memory diagnostic tests a few times, it said i have hardware problems,Im asuming its bad memory or RAM. I thought my graphics card i installed is causing the problems,but i took it...
BSOD Help and Support

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:00.
Twitter Facebook Google+