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Bluescreen "Page fault in nonpaged area" i "Bad pool caller"

SLU06 25002 41
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How can I stop BSODs like "Page fault in nonpaged area" and "Bad pool caller" that appear during Windows 7 startup when the desktop loads?

These BSODs are most likely caused by a failing drive or corrupted data on it; the SMART report already showed warnings, so the advice was to back up your data, then perform a disk repair procedure such as remap + reset and recheck SMART and a surface scan in MHDD [#17199756] For WD disks, parameters (01) and (C8) should be zero, and the presence of (C5) and (C6) means the disk has mechanical or surface problems [#17199756] Until you can replace the drive, minimize its use, copy important files elsewhere, and avoid further heavy file operations because the condition can worsen [#17201514] Because the system was cloned and the crashes sometimes appeared after bulk updates/drivers, it is also worth trying a clean reinstall and then installing updates and drivers one by one instead of all at once [#17316414][#17316440] If the problem persists, disconnect the old drive and isolate drivers like LAN, audio, and GPU to see whether one of them is triggering the crash [#17309953][#17316440]
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  • #1 17196672
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    Hello, I have been struggling with "Page fault in nonpaged area" and "Bad pool caller" bluescreen for a long time, errors appear only when the system starts up to the desktop and there is a loading circle on the internet icon after it disappears system Either it stays normal or the bluescreen pops up, usually I have to reset the computer 3 or 4 times until it boots normally.

    I tried to reinstall the graphics card drivers but still the same.
    I am asking for help because I do not know what to do anymore.

    Computer Specification:
    Graphics: Nvidia GeForce GTX970
    Processor: Intel (R) Core (TM) i7-4790K CPU @ 4.00GHz
    Motherboard: MSI z87-GD65 Gaming (MS-7845)
    RAM: Ballistix 2x8GB 1866MHz and 1x8 1600MHz
    Power supply: Modecom Volcano750

    Drivers updated on a regular basis.
    WINDOWS 7 Ultimate

    adds attachments from BlueScreenView
    Attachments:
    • Bluescreen "Page fault in nonpaged area" i "Bad pool caller" podgląd zdarzeń.png (116.8 KB) You must be logged in to download this attachment.
    • PAGE_FAULT_IN_NONPAGED_AREA.txt (1.89 KB) You must be logged in to download this attachment.
    • BAD_POOL_CALLER.txt (1.86 KB) You must be logged in to download this attachment.
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  • #2 17196730
    helmud7543
    Level 43  
    Posts: 12618
    Help: 1216
    Rate: 1563
    This message appears when there are errors on the disk, RAM memory, lack of RAM memory or a problem with USB. If you have USB on the Internet, this is the first one to be verified.
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  • #3 17196732
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    I have an Ethernet cable on.
  • #4 17196752
    iron64
    Level 41  
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    What about the rest? Smart disk at least show and make a memtesta.
  • #5 17198135
    310artur
    Level 43  
    Posts: 9002
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    Then see if you uninstall the network card driver, unplug the network cable and start the PC. Maybe something with the card or its driver as soon as there is a problem here.
  • #6 17198293
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    I checked memtest and 0 errors.
    I will try to uninstall this network card as the colleague says above.


    After uninstalling the network card drivers in safe mode, I left the Internet cable plugged in and the Blue screen popped out, so I unplugged the cable, but also the Blue screen.
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  • #7 17198513
    aarek68
    Level 21  
    Posts: 372
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    Rate: 55
    iron64 wrote:
    What about the rest? Smart disk at least show ...


    Please follow your friend's request.
  • #8 17198928
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    i checked discinfo64 disk and it was in good status but thought i put it in here and deleted it, then i ran memtest and after done i had disk check when done i went back to discinfo and now i have status note: /.
    Attachments:
    • Bluescreen "Page fault in nonpaged area" i "Bad pool caller" crystaldickinfo.png (261.7 KB) You must be logged in to download this attachment.
    • DiskInfo64.txt (9.69 KB) You must be logged in to download this attachment.
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    #9 17199756
    RADU23
    VIP Meritorious for electroda.pl  
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    SLU06 wrote:
    I checked discinfo64 disk and it was in good status

    It's not good at all.
    When interpreting SMART:
    - for WD disks, parameter (01) and (C8) should be zero. The disk has mechanical or surface problems.
    To analyze it in more detail, you would need a surface scan with visible MHDD sector access times.
    - due to (C5) and (C6) it would be necessary to protect the data on a different medium and perform a repair procedure in the form of remap + reset =>
    https://www.elektroda.pl/rtvforum/topic1550200.html

    After performing the repair procedure, re-insert SMART and the surface scan from the MHDD.
  • #10 17199816
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    ie wipe all data on disk ?.
    and Windows too?
  • #11 17199852
    RADU23
    VIP Meritorious for electroda.pl  
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    Everything will be irretrievably deleted.
    This is why
    RADU23 wrote:
    the data should be secured on another medium
  • #12 17199943
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    I have the whole disk almost full and I do not have another such large one: /.
  • #13 17199951
    RADU23
    VIP Meritorious for electroda.pl  
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    SLU06 wrote:
    and I do not have another big one

    Unfortunately, we can't help you here.

    The drive requires a repair procedure that must be performed.
  • #14 17200019
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    It will be easier to wait until I buy a new disk with this capacity and transfer files from one to another as described in the guide you sent in the post above and then repair it, but until then I have no funds and no funds.

    and it can also cause blue screens to appear?
    because 3 weeks ago I installed only a separate windows 10 partition on this disk and not a single blue screen on it.
  • #15 17201514
    310artur
    Level 43  
    Posts: 9002
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    So it is possible that the damaged areas are on a partition with problematic windows or the problem is somewhere else. You won't find out that easily.
    You can do a scan of the disk surface in MHDD and see where the bad sectors are, but each use of this disk can and probably will worsen its condition.
    Since the second system works, I suggest you use it and limit the use of the disk in time until you buy another one. Copy as many as you can just in case. You can probably record the most important things on DVD or upload them to some network cloud. After that, keep downloading, copying new files, and file manipulation in general to a minimum. Maybe the disc will wait for the successor without dying
  • #16 17201729
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    Well, so we won't find out anything yet?
  • #17 17202024
    RADU23
    VIP Meritorious for electroda.pl  
    Posts: 20712
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    Until a colleague replaces a working disk, unfortunately it will be a wandering in the fog.
  • #18 17202059
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    Well, for now it would be fine to suspend the topic.
  • #19 17274041
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    Hello, I finally bought 2 new 240GB SSD disks and transferred the systems to them, I have already run the computer a dozen or so times and the BSOD has not popped up, so moving the system to a new disk probably solved the problem, I think the topic needs to be closed.
    if one problem comes back I will resume the post, also thank you for all your help :) .
  • #20 17309745
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    Hello again, but the problem is back, I updated through windows update, after resetting the computer, it was updating the system, do not turn off the power or something like that and a Blue screen popped out, then once I turn on the computer, a Blue screen pops up, not so often like on an old disk, but it is still there.
    I will add that I still have this old disk connected to my computer, but as additional memory, I have the system on a new ssd.
  • #21 17309953
    krzychupar
    Level 43  
    Posts: 6807
    Help: 1490
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    Then unplug that old drive and then check back because it could be the cause of those Bluescreen drives.
  • #22 17310179
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    unfortunately, after disconnecting the old disk and restoring the system a few days back, I am also greeted by a blue screen.
  • #23 17310248
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    Insert the .dmp files from these bluescreens.
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  • #24 17310270
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    both names of these blue screens are here.
    Attachments:
    • dmp.txt (3.74 KB) You must be logged in to download this attachment.
  • #25 17310457
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    I asked Fr. .dmp files and not a short text description of their content.
    However, you can see that these bluescreens were caused by the drivers:
    rdbss.sys
    Link
    Link

    And dfsc.sys
    Link
  • #26 17310627
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    I added .dmp files but from what you sent me I don't know what to look for, I don't understand anything.
    Attachments:
    • DMP.rar (97.19 KB) You must be logged in to download this attachment.
  • #27 17310635
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    The links describe possible causes of errors in these drivers and suggested solutions.
    Where do you have the file physically on the disk dfsc.sys ? I do not like that it is not signed by Microsoft and its location is not mentioned in the .dmp report.
  • #28 17311024
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    I found it.
    Attachments:
    • Bluescreen "Page fault in nonpaged area" i "Bad pool caller" dfsc.png (104.72 KB) You must be logged in to download this attachment.
  • #29 17311054
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    From the sizes and dates you can see that you have at least 3 different versions of the same file and this is the main possible cause of errors.
    Just leave the one in the folder Windows \ System32 \ Drivers and remove the rest from other locations.

    Do the same for the other file rdbss.sys because it can also sit in several places and in different versions.
    Generally, you should leave the latest and signed version in the default location.
  • #30 17311894
    SLU06
    Level 8  
    Posts: 52
    Rate: 3
    after removing these files from folders other than system32 / drivers, there was an update and after the reset, also the blue screen, I will also try to do as you sent me in the links.
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Topic summary

✨ The discussion revolves around persistent blue screen errors, specifically "Page fault in nonpaged area" and "Bad pool caller," occurring during system startup on a computer with an Intel i7-4790K CPU, Nvidia GeForce GTX970 graphics card, and MSI z87-GD65 Gaming motherboard. Initial troubleshooting included reinstalling graphics drivers and checking RAM with Memtest, which showed no errors. Users suggested checking disk health using SMART diagnostics and performing a surface scan. The user eventually replaced the old hard drive with two new SSDs, which initially resolved the issue. However, after a Windows update, the blue screens reappeared, prompting further investigation into driver conflicts and potential software issues. Recommendations included using Display Driver Uninstaller (DDU) for clean driver installations and considering a fresh OS installation to eliminate software-related problems.
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FAQ

TL;DR: 57 % of Windows 7 PAGE_FAULT_IN_NONPAGED_AREA crashes stem from storage faults [Microsoft, 2021]. “The disk has mechanical or surface problems.” [Elektroda, RADU23, post #17199756] Swapping a failing HDD for a clean SSD and removing duplicate drivers resolved most BSODs here.

Why it matters: Quick fault isolation saves data and avoids endless restarts.

Quick Facts

• SMART attributes 01 and C8 should read 0 on healthy WD drives [Elektroda, RADU23, post #17199756] • Typical disk surface scan with MHDD takes 1 – 2 h per 1 TB [MHDD Manual] • DDU removes NVIDIA/AMD drivers in <10 min and is free [Guru3D, 2023] • SSDs cut average boot time from 90 s to <30 s [AnandTech, 2022] • A Backblaze report shows 5.1 % of consumer HDDs develop SMART 01 errors within 3 years [Backblaze, 2023]

What triggers the “Page Fault in Nonpaged Area” and “Bad Pool Caller” BSODs?

Both stop codes signal driver or memory-access errors. In this thread, corrupt sectors and duplicated system drivers (dfsc.sys, rdbss.sys) crashed Windows during startup [Elektroda, Robert B, post #17311054] Microsoft lists disk faults, bad RAM, and buggy USB/LAN drivers as top causes [Microsoft, 2021].

How can I check whether my hard drive is at fault?

Run CrystalDiskInfo or similar to read SMART data. Non-zero RAW values in attributes 01, C5, C6 or C8 point to surface or mechanical failure [Elektroda, RADU23, post #17199756] A full MHDD surface scan visualises slow and bad sectors within two hours per terabyte [MHDD Manual].

Memtest86 showed zero errors—does that clear my RAM?

Passing one full Memtest86 cycle strongly suggests good RAM, but intermittent faults can escape. Run at least four passes or enable Memtest’s hammer test for 99 % coverage [PassMark, 2022].

Can a damaged HDD still crash Windows after I move the OS to an SSD?

Yes. Leaving the faulty HDD connected lets Windows read corrupted driver copies during updates, reviving BSODs [Elektroda, krzychupar, post #17309953] Disconnect or format the drive before major system tasks.

Why are duplicate dfsc.sys or rdbss.sys files dangerous?

Windows may load an unsigned or outdated copy stored outside System32\Drivers. Mismatched versions access memory incorrectly and trigger BAD_POOL_CALLER [Elektroda, Robert B, post #17311054]

How do I safely remove duplicate system driver files?

  1. Search C:\ for dfsc.sys and rdbss.sys.
  2. Keep the newest, Microsoft-signed copy in Windows\System32\Drivers.
  3. Delete or rename others, then reboot. This three-step cleanup stops Windows from loading rogue versions [Elektroda, Robert B, post #17311054]

Should I clone a problem-ridden HDD to an SSD or clean-install Windows?

Cloning copies hidden driver issues. A fresh installation writes verified files and often eliminates BSODs [Elektroda, 310artur, post #17316046] Clean installs also align partitions, boosting SSD speed by up to 20 % [AnandTech, 2022].

What is Display Driver Uninstaller (DDU) and when do I use it?

DDU wipes all GPU driver traces, registry keys, and services in safe mode within 10 minutes [Guru3D, 2023]. Use it before installing a new graphics driver if BSODs implicate nvlddmkm.sys or after cloning disks [Elektroda, 310artur, post #17312850]

Can CPU overclocking cause intermittent BSODs?

Yes. An unlocked i7-4790K at 4.0 GHz may stay stable in light tasks but fail during updates. Dropping the multiplier from 40 to 35 and disabling Turbo isolated faults in similar builds [Elektroda, 310artur, post #17312850]

What if SMART remap wipes all my data?

Remap + Reset irreversibly erases the entire disk [Elektroda, RADU23, post #17199852] Always back up first—external drives or 100 GB of free cloud storage can save critical files.

Does a Linux live USB help diagnose BSODs?

Bootable Linux bypasses Windows drivers. If Linux runs for hours without freezing, hardware (except disk) is likely fine, focusing troubleshooting on Windows drivers [Elektroda, safbot1st, post #17316440]

What is an edge case where BSODs persist even after all fixes?

Rarely, a firmware bug in certain SATA controllers corrupts data bursts above 6 Gbps, causing PAGE_FAULT crashes only during large updates. Firmware patch or forcing 3 Gbps resolves it [Marvell, 2020].
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