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Bluescreen error : driver_irql_not_less_or_equal

By Vissu ยท 13 replies
Mar 8, 2011
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  1. hi,

    My system is restarting and i am getting the above error in a blue screen. This is happening every now and then. i am using hp pavilion dv6 1350us laptop with intel core 2 duo.

    i am getting the following error code on start up :

    BCCode: d1


    can you please help in solving the issue ?

    I haven't installed/upgraded to any OS. My laptop(bought in dec 2009) is pre-installed with Windows 7 home premium(64-bit) and from the past 1 year i am working on the same OS. I never had any problem. Windows 7 OS asks updates frequently and i allow it to update. I didnt uninstall/install any OS recently nor i updated drivers manually. i am facing this problem from the past 10 days or so.

    I have tried updating some of the drivers but no luck and i dont know which driver is causing the problem ? I am attaching my dump here. please reply as soon as possible.

    P.S : My sys is working fine in safe mode and i have another OS (Ubuntu) thats also working fine.

    Attached Files:

  2. craniumrat

    craniumrat TS Rookie


    I checked out the dump & it points to the 'Intel(R) WiFi Link 1000 BGN' driver (IMAGE_NAME: NETw5s64.sys).

    Image path: \SystemRoot\system32\DRIVERS\NETw5s64.sys
    Image name: NETw5s64.sys
    Timestamp: Wed Jan 13 10:37:13 2010 (4B4DF6B9)
    ImageSize: 0075F000

    You might want to try & grab the latest drivers from the Intel site.

  3. Vissu

    Vissu TS Rookie Topic Starter

    Blue screen rrror : driver_irql_not_less_or_equal


    Still i see the same error even after updating with the latest drivers from the intel site.
  4. craniumrat

    craniumrat TS Rookie


    Can you please paste the latest minidumps after updating to the latest drivers? Also, can you confirm that there are no warnings or errors in your Device Manager?

  5. Mark56

    Mark56 TechSpot Paladin Posts: 1,886

    I just had a look through your minidump and found several out of date drivers which all relate to the motherboard chipset dating back to 2007 and one as old as 2005, all pre windows 7. Go to the motherboard manufacturers site and get the full chipset drivers for windows 7 64bit. Then see if it improves.

    If that does not fix it use Driver Verifier to find any faulty drivers that might be causing the problem.

  6. Vissu

    Vissu TS Rookie Topic Starter



    i have updated the drivers from the hp site but even the problem persists.

    i ran the verifier.exe tool , the system rebooted normally and i didnt get any error.

    I dont know how i got the drivers backed 2005 , mine was new laptop when i bought in 2009 december.i never updated any drivers manually.

    My laptop is working normally in Safe mode with n/w and in my second OS ubuntu.
    please help me. One more thing is i am unable to find the latest minidump file in the c:/windows/MiniDump folder.
  7. Vissu

    Vissu TS Rookie Topic Starter


    The error code which i got is : stop : 0x000000c4
  8. Mark56

    Mark56 TechSpot Paladin Posts: 1,886

    OK, that error code is the one given when Driver Verifier catches a faulty driver so I need to see your minidump. Your settings may not be correct to save the dump file. Run through this first guide to check the settings are correct. Then, reboot and when it has another crash reboot back into safe mode and follow the last line from the Driver Verifier instructions to turn it off. Then boot back into normal mode and follow the second guide below to post the minidump so I can debug it and view the contents.

    Please provide the make and model number of the PC so I can check for the latest drivers.

  9. Vissu

    Vissu TS Rookie Topic Starter

    I think my last message was framed wrong.

    After running the verifier and restarting the system , i didnt get any error , it booted normally.

    The error code which i posted is the one which i used to get regularly whenever my system gets restarted.
  10. Rancid

    Rancid TS Rookie Posts: 17

    I feel I missed something...:confused:So is the problem fixed or is it still happening?
  11. Vissu

    Vissu TS Rookie Topic Starter


    I am getting BSOD frequently but as Mark said i am unable to reproduce the same when i ran the verifier and reboot my PC. Soon i will post the latest Dump files.
  12. Mark56

    Mark56 TechSpot Paladin Posts: 1,886

    Are you referring to the error code C4 quoted in post 7. A C4 error is only created when Driver Verifier detects a faulty driver. For this to happen Driver Verifier must be turned on, please check the settings in the Verifier.

    Meanwhile, please get those minidumps posted so we can get to the bottom of this.
  13. Vissu

    Vissu TS Rookie Topic Starter


    hi Mark,

    Yes i am referring about that error only. I got this error generally not after using verifier and rebooting the system. I will post the dumps this evening.

    Actually , overwriting existing files is checked so thats the reason i cant find latest dumps with the recent dates.
  14. Mark56

    Mark56 TechSpot Paladin Posts: 1,886

    OK, I am keen to see the dumps as something odd is going on. If you keep getting the C4 error then your driver verifier must be active. Go back to the last line of the instructions I gave and repeat what it says.

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