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Windows 7: Windows 7 64bit ntoskrnl.exe BSODs (UNEXPECTED_KERNEL_MODE_TRAP)

23 Apr 2015   #1

Windows 7 Home Basic 64bit
Windows 7 64bit ntoskrnl.exe BSODs (UNEXPECTED_KERNEL_MODE_TRAP)

Hello all,

I have been suffering from multiple intermittent BSOD's for a few weeks now (11 BSODs in less than 3 weeks) on my laptop. For this I have contacted HP support twice and had an engineer visit me and try to rectify the problem. As a result, the motherboard of the unit has been replaced last week which seemed to fix the problem before it starting happening again in the past few days, seemingly worse and more frequent than before.

I have done full virus scans, and the HP engineer has run Memory test, Hard disk test all of which have not given any untoward result. The BSOD's also seem to occur mainly when I am connected to the Internet using my Wireless router.

I have attached the DM Log Collector file with hopefully all 11 BSOD dumps.

Thanks a lot for reading this, have a good one.

My System SpecsSystem Spec
23 Apr 2015   #2

Microsoft Community Contributor Award Recipient

Windows 10 Home 64Bit


*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *

Use !analyze -v to get detailed debugging information.

BugCheck 7F, {8, 80050033, 406f8, fffff80002f0eff7}

*** WARNING: Unable to verify timestamp for athrx.sys
*** ERROR: Module load completed but symbols could not be loaded for athrx.sys
Probably caused by : athrx.sys ( athrx+15866d )

Followup: MachineOwner

1: kd> !analyze -v
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *

1: kd> lmvm athrx
start             end                 module name
fffff880`04a49000 fffff880`04df4000   athrx    T (no symbols)           
    Loaded symbol image file: athrx.sys
    Image path: \SystemRoot\system32\DRIVERS\athrx.sys
    Image name: athrx.sys
    Timestamp:        Thu Jun 14 14:23:09 2012 (4FD99F6D)
    CheckSum:         0039179C
    ImageSize:        003AB000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4
Update the Atheros Driver.

Sometimes drivers remain and do not get completely uninstalled.

 Driver Removal Process:

  • Download Driver Sweeper to the desired location.
  • Extract the files from the zip.
  • Uninstall the driver Program & Features - Control Panel.
  • Run Driver Sweeper, check the drivers you want to uninstall or clean registry leftovers of.
Link to full tutorial: Drivers - Clean Left over Files after Uninstalling

 Clean boot
Reduce items at start-up. No software except anti-virus is required plus doing this improves the time for logging into windows:Run the System File Checker that scans the of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible:
  • Click on the
  • Type CMD on Search
  • Left click and Run as Administrator
  • Type SFC /scannow
Full tutorial here:
My System SpecsSystem Spec

 Windows 7 64bit ntoskrnl.exe BSODs (UNEXPECTED_KERNEL_MODE_TRAP)

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