Bluescreen caused by pacer.sys

Question

Bluescreen caused by pacer.sys

Anonymous

My Desktop PC was freezing & blue screening a lot so I did a fresh install of windows (Win 7 HP 32 bit), apart from the OS all I’ve installed is the latest MB & Video card drivers, AVG & win updates. Prior to do doing the reinstall I updated the Bios I run hardware tests on ram and hard drive and all were ok, . It run fine for the first day but now it has come up with blue screen error caused by pacer.sys, I've run sfc and it didn't find any problems, any ideas on how to fix the problem?

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Dump File : 093011-24055-01.dmp

Crash Time : 30/09/2011 11:17:12 AM

Bug Check String : DRIVER_IRQL_NOT_LESS_OR_EQUAL

Bug Check Code : 0x000000d1

Parameter 1 : 0x0000104c

Parameter 2 : 0x00000002

Parameter 3 : 0x00000001

Parameter 4 : 0x9073d05e

Caused By Driver : pacer.sys

Caused By Address : pacer.sys+105e

File Description :

Product Name :

Company :

File Version :

Processor : 32-bit

Crash Address : ntkrnlpa.exe+415cb

Stack Address 1 : pacer.sys+105e

Stack Address 2 : pacer.sys+7b9d

Stack Address 3 : NETIO.SYS+1b3a9

Computer Name :

Full Path : D:\Desktop\Minidump\093011-24055-01.dmp

Processors Count : 4

Major Version : 15

Minor Version : 7601

Dump File Size : 145,256

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Answer 1

Hi,

References to Vista also apply to Windows 7.

This is my generic how to for proper driver updates :

This utility makes it easy to see which versions are loaded :

DriverView - Free - utility displays the list of all device drivers currently loaded on your system.

For each driver in the list, additional useful information is displayed: load address of the driver,

description, version, product name, company that created the driver, and more.

http://www.nirsoft.net/utils/driverview.html

For Drivers check System Maker as fallbacks and Device Maker's which are the most current.

Control Panel - Device Manager - Display Adapter - write down the make and complete model

of your video adapter - double click - Driver's tab - write down the version info. Now click UPdate

Driver (this may not do anything as MS is far behind certifying drivers) - then Right Click -

Uninstall - REBOOT this will refresh the driver stack.

Repeat that for Network - Network Card (NIC), Wifi, Sound, Mouse and Keyboard if 3rd party

with their own software and drivers and any other major device drivers you have.

Now go to System Maker's site (Dell, HP, Toshiba as examples) (as rollback) and then Device

Maker's site (Realtek, Intel, Nvidia, ATI as examples) and get their latest versions. (Look for

BIOS, Chipset and software updates at System Maker's site while there.)

Download - SAVE - go to where you put them - Right Click - RUN AD ADMIN - REBOOT after

each installation.

Always check in Device Manager - Drivers tab to be sure the version you are installing actually

shows up. This is because some drivers rollback before the latest is installed (sound drivers

particularly do this) so install a driver - reboot - check to be sure it is installed and repeat as

needed.

Repeat at Device Makers - BTW at Device Makers DO NOT RUN THEIR SCANNER - check

manually by model.

Manually look at manufacturer's sites for drivers - and Device Maker's sites.

http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm

Installing and updating drivers in 7 (updating drivers manually using the methods above is preferred

to ensure the latest drivers from System maker and Device makers are found)

http://www.sevenforums.com/tutorials/43216-installing-updating-drivers-7-a.html

If you update drivers manually then it is a good idea to disable Driver Installations in Windows

Updates, this leaves Windows Updates ON however it will not install drivers which will usually

be older and cause issues. If Updates suggests a new driver then HIDE it (Right Click on it)

and then go look for new ones manually if you wish.

Stop Windows 7 from Automatically Installing Device Drivers

http://helpdeskgeek.com/windows-7/stop-windows-7-from-automatically-installing-device-drivers/

How To Disable Automatic Driver Installation In Windows 7 / Vista

http://www.addictivetips.com/windows-tips/how-to-disable-automatic-driver-installation-in-windows-vista/

Disable Windows Update Device Driver Search Prompt In Windows 7 / Vista (for Professional,

Ultimate, and Enterprise)

http://www.addictivetips.com/windows-tips/disable-windows-update-device-driver-search-prompt/

==========================================

Memory tests do not catch all errors such as mismatched memory (possible even for sticks

that appear to be identical) and when faster memory is placed in system behind slower memory.

So it is best to also swap sticks in and out to check for those even if all memory tests fail to show

a problem.

To test RAM check here - let it run 4+ hours or so. <-- best methodwww.memtest.org

For the Windows Memory Diagnostic Tool.

Start - type in Search box -> Memory - find Memory Diagnostics tool at top of list - Right Click -

RUN AS ADMIN follow the instructions

Windows Vista: How to Scan / Test your RAM or Memory with Windows Vista Memory Diagnostic

Tool

http://www.shivaranjan.com/2007/11/01/windows-vista-how-to-scan-test-your-ram-or-memory-with-windows-vista-memory-diagnostic-tool/

How to Run the Memory Diagnostics Tool in Windows 7

http://www.sevenforums.com/tutorials/715-memory-diagnostics-tool.html

Test Your Computer’s Memory Using Windows Vista Memory Diagnostic Tool

http://www.howtogeek.com/howto/windows-vista/test-your-computers-memory-using-windows-vista-memory-diagnostic-tool/

Hope this helps.

Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle - Mark Twain said it right.

Answer 2

Hi,

Since you re-installed Windows the issue has to be hardware or something that runs at a very low level.

Pacer.sys and Netio.sys are components of Windows which means something else drove them to Fault.

Major suspects are the network hardware and drivers. Another would be McAfee if you are using that.

For BlueScreen troubleshooting methods using BlueScreenView and MyEventViewer see my replies

in this thread - top 3 answers (+1 other).

http://social.answers.microsoft.com/Forums/en-US/w7repair/thread/c675b7b8-795f-474d-a1c4-6b77b3fcd990

We can analyze the minidumps if you make them available from the SkyDrive or other file

sharing sites.

Zip or upload the contents of C:\Windows\minidump

Use SkyDrive to upload collected files.

http://social.technet.microsoft.com/Forums/en-US/w7itproui/thread/4fc10639-02db-4665-993a-08d865088d65

==============================================================

BCCode: D1 0x000000D1Check these KB's

Stop error when you resume a computer that is running Windows 7 or Windows Server 2008 R2

from sleep or from hibernation: "STOP: 0x000000D1"

http://support.microsoft.com/kb/978982

Stop error on a Windows Server 2008 R2-based or Windows 7-based computer when the operating

system uses a virtual storport miniport driver to save a dump file or a hibernation file: "0x000000D1"

http://support.microsoft.com/kb/2320550

Those and 7 other KB Articles are available

http://support.microsoft.com/search/default.aspx?mode=a&query=0x000000D1&spid=14019&catalog=LCID%3D1033&1033comm=1&res=10

Think Video drivers mainly though it can be others. See the driver section in my generic bluescreen

troubleshooting methods below. BIOS, low level chipset drivers and antivirus/antispyway/security

programs can also cause this. Check the troubleshooter and when you get to the driver and memory testing sections refer to the generic methods in next message and then return to the troubleshooter

if needed.

Cause

A driver tried to access an address that is pageable (or that is completely invalid) while the IRQL was too high.

This bug check is usually caused by drivers that have used improper addresses.

If the first parameter has the same value as the fourth parameter, and the third parameter indicates an execute operation, this bug check was likely caused by a driver that was trying to execute code when the code itself was paged out. Possible causes for the page fault include the following:

The function was marked as pageable and was running at an elevated IRQL (which includes obtaining a lock).
The function call was made to a function in another driver, and that driver was unloaded.
The function was called by using a function pointer that was an invalid pointer.

BCCode: d1 0x000000d1 <-- read this linkhttp://www.faultwire.com/solutions-fatal\_error/DRIVER-IRQL-NOT-LESS-OR-EQUAL-0x000000D1-\*1210.html?order=votes

=========================================

Look in the Event Viewer to see if anything is reported about those.

http://www.computerperformance.co.uk/vista/vista\_event\_viewer.htm

MyEventViewer - Free - a simple alternative to the standard event viewer of Windows.TIP - Options - Advanced Filter allows you to see a time frame instead of the whole file.

http://www.nirsoft.net/utils/my\_event\_viewer.html

Here are some methods to possibly fix the blue screen issue. If you could give the Blue Screen

info that would help. Such as the BCC and the other 4 entries on the lower left. And any other

error information such as STOP codes and info such as IRQL_NOT_LESS_OR_EQUAL or PAGE_FAULT_IN_NONPAGED_AREA and similar messages.

As examples :

BCCode: 116

BCP1: 87BC9510

BCP2: 8C013D80

BCP3: 00000000

BCP4: 00000002

or in this format :

Stop: 0x00000000 (oxoooooooo oxoooooooo oxooooooooo oxoooooooo)

tcpip.sys - Address 0x00000000 base at 0x000000000 DateStamp 0x000000000

This is an excellent tool for posting Blue Screen Error InformationBlueScreenView scans all your minidump files created during 'blue screen of death'crashes, and displays the information about all crashes in one table - Free

http://www.nirsoft.net/utils/blue\_screen\_view.html

Many BlueScreens are caused by old or corrupted drivers, especially video drivers however

there are other causes.

You can do these in Safe Mode if needed or from Command Prompt from Vista DVD or

Recovery Options if your system has that installed by the maker.

How to Boot to the System Recovery Options in Windows 7

http://www.sevenforums.com/tutorials/668-system-recovery-options.html

You can try a System Restore back to a point before the problem started if there is one.

How to Do a System Restore in Windows 7

http://www.sevenforums.com/tutorials/700-system-restore.html

Start - type this in Search Box -> COMMAND find at top and RIGHT CLICK - RUN AS ADMIN

Enter this at the prompt - sfc /scannow

How to Repair Windows 7 System Files with System File Checker

http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program

generates in Windows Vista cbs.log (and Windows 7)

http://support.microsoft.com/kb/928228

The log might give you the answer if there was a corrupted driver. (Does not tell all the possible

driver issues).

Also run CheckDisk so we can rule out corruption as much as possible.

How to Run Check Disk at Startup in Windows 7

http://www.sevenforums.com/tutorials/433-disk-check.html

Often updating drivers will help, usually Video, Sound, Network Card (NIC), WiFi, 3rd party

keyboard and mouse, as well as other major device drivers.

Manually look at manufacturer's sites for drivers - and Device Maker's sites.

http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm

Installing and updating drivers in 7 (updating drivers manually using the methods above is preferred

to ensure the latest drivers from System maker and Device makers are found)

http://www.sevenforums.com/tutorials/43216-installing-updating-drivers-7-a.html

Stop Windows 7 from Automatically Installing Device Drivers

http://helpdeskgeek.com/windows-7/stop-windows-7-from-automatically-installing-device-drivers/

Disable Windows Update Device Driver Search Prompt In Windows 7 / Vista (for Professional, Ultimate, and Enterprise)

http://www.addictivetips.com/windows-tips/disable-windows-update-device-driver-search-prompt/

How to fix BlueScreen (STOP) errors that cause Windows Vista to shut down or restart

unexpectedly

http://support.microsoft.com/kb/958233

Troubleshooting Vista Blue Screen, STOP Errors (and Windows 7)

http://www.chicagotech.net/vista/vistabluescreen.htm

Understanding and Decoding BSOD (blue screen of death) Messages

http://www.taranfx.com/blog/?p=692

Windows - Troubleshooting Blue Screen Errors

http://kb.wisc.edu/page.php?id=7033

In some cases this might be required.

StartUp Repair from Recovery Options or Windows 7 disk

How to Run a Startup Repair in Windows 7

http://www.sevenforums.com/tutorials/681-startup-repair.html

How to Boot to the System Recovery Options in Windows 7

http://www.sevenforums.com/tutorials/668-system-recovery-options.html

How to Create a Windows 7 System Repair Disc

http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html

Hope this helps.

Rob Brown - Microsoft MVP <- profile - Windows Expert - Consumer : Bicycle - Mark Twain said it right.

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Bluescreen caused by pacer.sys

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