Windows 10: BSOD IRQL_NOT_LESS_OR_EQUAL L1C63x64.sys Windows 10

AMD FXfm 6300 Six-Core Processor 3.50 GHzRAM 16 GbM5A78L-M LX3 Windows 10 Pro 64xBIOS American Megatrends Inc. 1201, 19.04.2013 - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">- <System> <Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331c3b3a-2005-44c2-ac5e-77220c37d6b4}" /> <EventID>41</EventID> <Version>8</Version> <Level>1</Level> <Task>63</Task> <Opcode>0</Opcode> <Keywords>0x8000400000000002</Keywords> <TimeCreated Sy

:)

 

BSOD - driver_irql_not_less_or_equal (l1c63x64.sys)

Hi Seung,

Sorry for the inconvenience caused by BSOD - driver_irql_not_less_or_equal (l1c63x64.sys).

Please let us know the make/model of your computer.

The L1C63x64.sys is the Atheros LAN driver and I would suggest to uninstall and reinstall the Atheros LAN driver but install the latest Atheros LAN driver by visiting the manufacture's website and avoid using any LAN driver available though Windows Update.

However the problem could also be with any VPN software and other software so make sure you have the latest version of each of these software.

If the errors continue uninstall the VPN software and check if the issue persist.

Hope this helps. Get back to us for further queries for BSOD - driver_irql_not_less_or_equal (l1c63x64.sys). We are happy to help!

 

BSOD IRQL_NOT_LESS_OR_EQUAL (L1C63x64.sys) on Windows 10

I am getting BSOD for two consecutive days with the same error code "IRQL_NOT_LESS_OR_EQUAL" caused by L1C63x64.sys, which is a driver for

"Qualcomm Atheros AR8171/8175 PCI-E Gigabit Ethernet Controller (NDIS 6.30)".

Current driver version in my laptop is 2.1.0.21. I tried to find a newer driver in ASUS website ([1], [2]) and other online sources, I can only find the same version of driver (2.1.0.21) for "Windows 8.1"! I can't find one made for Windows 10.

Any other way to mitigate this? I can only use Ethernet in certain places (in other places I just use Wifi), so disabling driver is not really an option.

Thanks in advance.

Device model: ASUS X450LCP laptop (3-4 years old).

[1]: ｜｜ASUS Global

[2]: http://dlcdnet.asus.com/pub/ASUS/nb/DriversForWin8.1/LAN/LAN_QualcommAtheros_Win81_64_VER21021.zip

 

BSOD while using the internet. error (L1C63x64.sys)


Hi trainman81,

Welcome to the 10forums.

Daemon tools, Alcohol 120% and Power Archiver Pro uses SCSI Pass Through Direct (SPTD), which is a well known cause for BSOD's.
Please remove Daemon Tools and run the SPTD pass through remover.

1. Uninstall Daemon Tools
2. Download the SPTD standalone installer and follow these steps:
   • Double click the executable to open it
   • Click on the button shown below

If the button is grayed out, like in the image, there is no more SPTD installation on your system, and you can close the window


AVG is trying to request data from the internet, which is why the network driver is marked as the cause.
Code:

Code:

*** WARNING: Unable to verify timestamp for L1C63x64.sys *** ERROR: Module load completed but symbols could not be loaded for L1C63x64.sys 0: kd> lmvm L1C63x64 start             end                 module name fffff801`89700000 fffff801`89722000   L1C63x64 T (no symbols)                Loaded symbol image file: L1C63x64.sys     Image path: \SystemRoot\System32\drivers\L1C63x64.sys     Image name: L1C63x64.sys     Timestamp:        Mon Apr 01 05:15:17 2013 (5158FBC5)     CheckSum:         000245C4     ImageSize:        00022000     Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

AVG drivers that have been flagged
Code:

Code:

*** WARNING: Unable to verify timestamp for avgwfpa.sys *** ERROR: Module load completed but symbols could not be loaded for avgwfpa.sys *** WARNING: Unable to verify timestamp for avgfwd6a.sys *** ERROR: Module load completed but symbols could not be loaded for avgfwd6a.sys

Please uninstall AVG and see if it helps
Uninstall AVG | AVG
It is further recommended to check your Qualcomm network driver for updates, its driver is not supported for Windows 10.
Driver Reference Table - L1C63x64.sys