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Windows 7: BSOD on boot - stop code 0X0000007F Dell Latitude Laptop

26 Apr 2013   #1

OEM Windows 7 Ult (x64) SP1
BSOD on boot - stop code 0X0000007F Dell Latitude Laptop


Dell Latitude 6500 laptop running OEM Win7/32 SP1, fully patched and previously stable.
Rig will be 4 years old in a few months, so I suppose it could be impending hardware failure?

FWIW, drivers are UTD according to Dell site, but there is a BIOS update available (I hadn't updated it, as the rig had been very stable).

BSOD with stop code 0x0000007F.
Was able to reboot into Windows without incident immediately thereafter.

  • There was a recent patch to my security suite (KIS2013) within the past few days.
  • However, the rig had been rebooted several times since then without incident and the system was stable.
  • And I installed MS KB2840149 on 4/24 without incident, having uninstalled KB2823324 shortly after the Patch Tuesday debacle (even though I had NO problem with 2823324).
  • No other recent software or hardware changes.
  • KACE & encryption software have been installed for quite some time, and have caused no known issues.

SF Diagnostic Tool log & zipped mini-dump are attached (I think).

Please advise.

Much appreciated!

NOTE: This is NOT the system listed in my profile's "system specs". I have 3 different Win7 rigs. The one for which I am reporting this BSOD is the laptop.

My System SpecsSystem Spec
26 Apr 2013   #2

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit

Hello MoxieMomma.

The BSOD is caused by Kaspersky Antivirus, which made Intel(R) WiFi Link 5300 AGN driver blocked.
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *

Use !analyze -v to get detailed debugging information.

BugCheck 7F, {0, 0, 0, 0}

Unable to load image \SystemRoot\system32\DRIVERS\NETwNs32.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for NETwNs32.sys
*** ERROR: Module load completed but symbols could not be loaded for NETwNs32.sys
Unable to load image \SystemRoot\system32\DRIVERS\klim6.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for klim6.sys
*** ERROR: Module load completed but symbols could not be loaded for klim6.sys
*** WARNING: Unable to verify timestamp for kltdi.sys
*** ERROR: Module load completed but symbols could not be loaded for kltdi.sys
Probably caused by : NETwNs32.sys ( NETwNs32+741a0 )

Followup: MachineOwner
Description of drivers here:
What is kltdi.sys from Kaspersky Lab? (id:10375435)
What is kltdi.sys from Kaspersky Lab? (id:10375435)
What is netwns32.sys ? | System Explorer

And the WiFi driver is backdated.
95635000 95cbf000   NETwNs32 T (no symbols)           
    Loaded symbol image file: NETwNs32.sys
    Image path: \SystemRoot\system32\DRIVERS\NETwNs32.sys
    Image name: NETwNs32.sys
    Timestamp:        Wed Jul 14 17:12:16 2010 (4C3DA298)
    CheckSum:         00686E74
    ImageSize:        0068A000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
Uninstall Kaspersky using Kaspersky Removal Tool. Use Microsoft Security Essentials as your antivirus with windows inbuilt firewall, and free MBAM as the on demand scanner.
Download, install and update those, and then run full system scans with both of them, one by one.

Update Intel(R) WiFi Link 5300 AGN driver from

Free up the startup. Windows does not need any other program to auto start with it, but the auto start programs often conflicts and causes various problems including BSODs.
  1. Click on the Start button
  2. Type “msconfig (without quotes), click the resulting link. It will open the System Configuration window.
  3. Select the “Startup” tab.
  4. Deselect all items other than the antivirus.
  5. Apply > OK
  6. Accept then restart.
Let us know the results.

klim6 Kaspersky Anti-Virus NDIS 6 Filter c:\windows\system32\drivers\klim6.sys Kernel Driver
kltdi kltdi c:\windows\system32\drivers\kltdi.sys Kernel Driver
netwns32 ___ Intel(R) Wireless WiFi Link 5000 Series Adapter Driver for Windows 7 - 32 Bit c:\windows\system32\drivers\netwns32.sys Kernel Driver Yes

► Update Ricoh Memory Card Reader driver from Home | Ricoh Global
► Download and install this particular versionof Intel Rapid Storage Driver:
95d0f000 95d20000   rimmptsk   (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\rimmptsk.sys
    Image name: rimmptsk.sys
    Timestamp:        Thu Jun 25 13:28:09 2009 (4A432E11)
    CheckSum:         000134E8
    ImageSize:        00011000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
8d410000 8d4ea000   iaStor     (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\iaStor.sys
    Image name: iaStor.sys
    Timestamp:        Fri Aug 07 17:46:56 2009 (4A7C1B38)
    CheckSum:         00053E42
    ImageSize:        000DA000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
My System SpecsSystem Spec
26 Apr 2013   #3

OEM Windows 7 Ult (x64) SP1

Thank you, Arc, for your prompt and expert reply.

KIS driver:
It appears that the BSOD can be attributed to the recent KIS patch.
FWIW, I have been running KIS on this system for nearly 3 years.
Before undertaking the KIS uninstall > MSE install, etc, I think I might submit a ticket to KL Tech Support.

Wifi Driver:
I could well be wrong about this (as I am just a home user), but I was always instructed over the years with many OEM systems to obtain driver updates for OEM systems only from the computer manufacturer, not from the hardware component manufacturer?
IIRC the rationale is that the OEMs test the drivers and sometimes customize them for their platforms?
Is that no longer the case?
I just looked this morning on the Dell drivers and downloads page for my service tag and I **thought** I had the current Wifi driver.
I will look again.

Anyway, this looks as if it's going to be a time-consuming ordeal.
So, it may be a few days before I can report back with progress.

Thanks so much for your excellent help!
My System SpecsSystem Spec


 BSOD on boot - stop code 0X0000007F Dell Latitude Laptop

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