Blue Screen (Bad Pool Caller)

Original Title: Blue Screen (Bad Pool Caller) Please help.

I have used the BlueScreenView v1.32 and I tells me that the offending driver is ntoskrnl.exe

I had previously encountered a bluescreen error before (bad pool caller as well) and the offending driver that time was ehdrv.sys

Could someone please help? 



Question Info

Last updated February 16, 2019 Views 49,950 Applies to:


Don't worry about having used the System Restore however its best in
most BSOD cases to not use it as you are then troubleshooting a system
that has changed. In some cases a System Restore may help however
it is usually best to be fairly sure before that is done.

BugCheck 50, {fffffa800bbde000, 0, fffffa8007292323, 0}
Probably caused by : ntkrnlmp.exe 
PROCESS_NAME:  ekrn.exe (this is Eset)

The CAUSE shown is ntkrnlmp.exe which is a Windows component
which means something else drove it into Fault. Eset was the process
running however that does not guarantee that it was the root cause.

Eset is not known for causing or aggravating BSOD issues so you
should check with Eset Support and ask in their forums for any known
issues. It may be necessary to uninstall Eset and if so be sure to use
their Removal Tool or special instructions to be sure remnants art not
left behind which can cause strange issues. Below are recommendations
to use while testing.


BCCode: 50      0x00000050

References to Vista also apply to Windows 7.

Have you added any hardware lately? Have you updated any driver just before these started? (Check
Control Panel - Windows Updates to see if any drivers were updated there about the time this started)
Main likely culprits are Video driver, other major drivers, memory, and antivirus/antispyware/security
products could be at fault as well as drive issues.

Use the troubleshooter below and refer to the next message for drivers and memory when you get to
those sections and then return back to the troubleshooter as needed.

BCCode: 50     0x00000050


The BCCode 50 usually occurs after the installation of faulty hardware or in the event of failure
of installed hardware (usually related to defective RAM, be it main memory, L2 RAM cache, or
video RAM).

Another common cause is the installation of a faulty system service.

Antivirus software can also trigger this error, as can a corrupted NTFS volume.

Resolving the Problem

Resolving a faulty hardware problem: If hardware has been added to the system recently,
remove it to see if the error recurs. If existing hardware has failed, remove or replace
the faulty component. You should run hardware diagnostics supplied by the system manufacturer.
For details on these procedures, see the owner's manual for your computer.

Resolving a faulty system service problem: Disable the service and confirm that this
resolves the error. If so, contact the manufacturer of the system service about a possible
update. If the error occurs during system startup, restart your computer, and press F8 at
the character-mode menu that displays the operating system choices. At the resulting
Windows Advanced Options menu, choose theLast Known Good Configuration option.
This option is most effective when only one driver or service is added at a time.

Resolving an antivirus software problem: Disable the program and confirm that this resolves
the error. If it does, contact the manufacturer of the program about a possible update.

Resolving a corrupted NTFS volume problem:  Run Chkdsk /f /r to detect and repair disk
errors. You must restart the system before the disk scan begins on a system partition. If
the hard disk is SCSI, check for problems between the SCSI controller and the disk.

Finally, check the System Log in Event Viewer for additional error messages that might help
pinpoint the device or driver that is causing the error. Disabling memory caching of the BIOS
might also resolve it.

BCCode: 50      0x00000050  <-- read this link*1095.html?order=votes


In this case it would be best to look at the hardware, BIOS, low level
chipset drivers, and other major device drivers before uninstalling

Eset Uninstall/Removal Tool and Instructions.


Here is what I use and recommend : (These are all Free versions and very effective.) 

Avast and Prevx have proven extremely reliable and compatible with everything I have
thrown at them. Microsoft Security Essentials and Prevx have also proven to be very
reliable and compatible. Use MSE and Prevx or Avast and Prevx however not all 3.

Avast Home Free - stop any shields you do not need except leave Standard, Web, and
Network running.

Prevx - Home - Free

Windows Firewall

Windows Defender (not needed if using MSE)

IE - Protected Mode

IE 8 - SmartScreen Filter ON  (IE 7 Phishing Filter)

I also have IE to always start with InPrivate Filter active if IE 8.
(You occasionally have to turn it temporarily off with the little Icon on LEFT of the + bottom
right of IE)

Two versions of Avast are available 6.x and 4.8x

Avast 6.x - Home - Free - Stop the Shields you do not use (except File, Web, Network, &
Behavior) - double click the Orange Icon in Notification Area - Real Time Shields - click the
Shield you want to stop - STOP. To stop the Orange Icon from showing an error indicator -
click the Orange Icon - Upper Right - Settings - click Status Bar - uncheck the Shields you
disabled - click OK

Avast 4.8x - Home - Free - stop any shields you do not need except leave Standard, Web,
and Network running. (Double Click Blue icon - details next to OK. - upper left Shields -
Terminate those you do not use.)

Or use Microsoft Security Essentials - Free

Prevx works well along side Avast or MSE

Prevx - Home - Free small, fast, exceptional CLOUD protection, works with other security
programs. This is a scanner only, VERY EFFECTIVE, if it finds something come back here
or use Google to see how to remove.   <-- information  <-- download

PCmag - Prevx - Editor'a Choice,2817,2346862,00.asp

Also get Malwarebytes - free - use as scanner only. If you ever suspect malware, and that
would be unsual with Avast and Prevx running except for an occasional low level cookie
(no big deal), UPDATE it and then run it as a scanner. I have many scanners and they
never find anything of note since I started using this setup.


Use the troubleshooters previously posted to try to solve this issue.

Hope this helps.

Rob Brown - Microsoft MVP - Windows and Devices for IT 2010 - current
Windows Insider MVP 2016 - current

2 people were helped by this reply


Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.