1.    05 Dec 2017 #1


    I am repeatedly getting a BSOD. Log zip attached.

    Initially it was CLASSPNP.SYS crash and auto reboot whereupon it would work ok for a while. Picture attached.

    BUT JUST NOW IT WAS "MEMORY MANAGMENT" stopcode and reboot to desktop. I would sign in and the BSOD would appear again reboot etc. I turned off the PC with the switch at the back and can use the PC again. Picture attached.

    I also get BitDefender Threat Scanner.dmp white box on shutdown sometimes. Picture attached.

    I have tried many things;
    1. Updated the BIOS.
    2. Did the Intel ME security Asus update.
    3. Reloaded Chipset Drivers.
    4. Updated Graphics card driver.
    5. SDAV.dll file replaced in Spybot Search and Destroy.
    6. Uninstalled/Reinstalled Kaspersky Internet Security.

    Any help much appreciated.

    Attached Thumbnails Attached Thumbnails 20171204_132827.jpg   20171204_100415.jpg   20171205_192508.jpg  
    BSOD CLASSPNP.SYS and lastly MEMORY MANAGMENT. Attached Files
      My ComputerSystem Spec

  2. philc43's Avatar
    Posts : 3,590
    64bit Win 10 Pro ver 1809 Build 17763.1 and W10 Insider Build 18252
       05 Dec 2017 #2

    Hello Philip :)

    There are two drivers that are identified as possible causes:
    1. Kaspersky : klbackupdisk.sys - dated Fri Sep 29 11:24:08 2017
    2. Aomei BackUpper driver: ambakdrv.sys - dated Tue Dec 25 08:46:35 2012

    For now try removing the Kaspersky and Aomei software and see if it stops the BSOD. Windows Defender will work quite well as an AV tool.
      My ComputersSystem Spec

  3. Posts : 20,757
    windows 10 professional version 1607 build 14393.969 64 bit
       05 Dec 2017 #3

    The first image displayed Bitdefender and one of the BSOD was related to Kaspersky.
    Please list all of the AV or malware software that is in use on the computer (automatic and manual).
      My ComputerSystem Spec

  4.    06 Dec 2017 #4

    Software used.

    Thanks for your replies.
    Re other AV software I attach a screenshot from a Belarc Advisor scan that lists all the software installed on my PC.
    I have highlighted some.

    I also attach a Backup and Sync Blue Screen I get related I think to Google Photos I use but this might be separate issue.

    In addition I use these Portable programs mostly only occasionaly unless stated:

    Trusteer Rapport in Firefox and Chrome for security - used often
    TLP Too Long Path Detector
    Notepad - used a lot
    NotePad++ - used alot
    Channelizer - used occasionally

    I will wait for any replies before disabling Kaspersky and Amoei Backerupper. Reinstalling Kaspersky I think gave some respite.

    It is hard to be sure but I think problems occur when in Firefox or leaving it - I may be wrong.

    Thanks again.
    Attached Thumbnails Attached Thumbnails 20171206 Belarc Advisor Computer Profile.jpg   20171203_185343.jpg  
      My ComputerSystem Spec

  5. Posts : 20,757
    windows 10 professional version 1607 build 14393.969 64 bit
       06 Dec 2017 #5

    When using AV products and then uninstalling them they may leave behind software unless the manufacturer uninstall tools are used.

    Please run each of these uninstall tools to make sure the only AV product remaining on the computer is Windows defender:

    Removal tool for Kaspersky Lab products (kavremover)

    Uninstall Bitdefender
      My ComputerSystem Spec

  6.    06 Dec 2017 #6

    Hello zbook.
    I will do as you say.
    Should I also uninstall SpyBot Search and Destroy as I believe it uses the BitDefender engine?
      My ComputerSystem Spec

  7.    06 Dec 2017 #7

    Can I immediately install Avast Free Antivirus for better protection that Windows Defender?
      My ComputerSystem Spec

  8. Posts : 20,757
    windows 10 professional version 1607 build 14393.969 64 bit
       06 Dec 2017 #8

    Please remove all AV products during the troubleshooting process using the applicable uninstall tools.
    Turn on Windows defender.
    If there are no BSOD within 1 - 2 weeks after the BSOD troubleshooting is completed you can reinstall AV products 1 at a time.
    The aim is to have sufficient stability so that you know there are no longer any BSOD. Then you can install software and if there are any new BSOD have a strong cause and effect. If the re-installation of the software produces BSOD then look for another AV product. If the re-installation of the AV product does not product BSOD then you can continue to use the software.

    Drivers get corrupted and may need reinstallation of the same driver that is not corrupted. The AV products can confound the troubleshooting process. So if you can uninstall the AV products and reinstall them 1 at a time over days that will improve the BSOD troubleshooting.

    There should only be 1 always on AV product other than Spybot or Malwarebytes as the AV products can interfere with each other. So AV protection can be reduced by having AV compete with each other.
      My ComputerSystem Spec

  9.    06 Dec 2017 #9

    Ok got it. Thanks for the explanation.
      My ComputerSystem Spec

  10.    01 Feb 2018 #10

    All sorted!

    In case this helps others:

    I tried do as advised above. Some problems were solved for a while but could come back or new ones came up. I think I was doing more harm than good.

    I sorted all the problems I was having by:
    1. Using the Windows 10 Media Creation Tool to create a W10 USB stick. See: Download Windows 10
    2. Powered up the PC, browsed to "setup.exe" on the stick and opted to keep progs and data. Don't let PC boot from the USB stick as I don't believe you get the same option so it needs a PC that sort of works.
    3. Two or three hours later all done!
    4. I did have to reinstall my 9 year old scanner software but that was pretty much it.
    5. No BSODs or crashes since doing this 7 weeks ago.

    Thank you all for your help. It is good to know there are people like you out there. The moral support was itself a help.
      My ComputerSystem Spec


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