Recurring BSOD unknown reason, error STOP: 0x0000004A


  1. Istafa
    Posts : 2
    Windows 7 Professional 64bit
       New #1

    Recurring BSOD unknown reason, error STOP: 0x0000004A


    My ASUS laptop is experiencing recurring BSODs, about twice a day, unpredictably.

    Bug Check String: IRQL_GT-ZERO_At_SYSTEM_SERVICE

    Bug Check Code: 0x0000004a

    I have no idea what the problem is but it may be to do with an installation of NetNanny.

    BlueScreenView, a program that reads dump files for me, tells me it most likely has something to do with ntoskrnl.exe, with adress in stack ntoskrnl.exe+6ede9

    In the windows event log, this critical error has

    source: Kernel-Power

    event ID: 41

    Task category (63)

    Any help would be appreciated, many thanks in advance.

    Please find attachedm my SF diagnostic tool grab all zip file.
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  3. YoYo155
    Posts : 3,056
    Windows 10
       New #2

    Welcome to SF Istafa :) .

    The bugchecks appear to be caused by a device driver the common denominator is BitDefender,
    more specifically its firewall driver. Please remove it.
    Do you have another Anti-Virus software that I may have missed?

    If you don't. For the time being and troubleshooting purposes use Microsoft Security Essentials.

    Keep us posted.
      My Computer
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  4. Istafa
    Posts : 2
    Windows 7 Professional 64bit
    Thread Starter
       New #3

    I dont have any other antivirus apart from "windows firewall with advanced security" which came with the operating system but is turned off.

    I am reluctant to delete bitdefender as i am not sure if i will lose the rest of my license as i payed for it.

    I will find out that if you can keep your licence if you re-install and how first.

    Are you sure it isnt to do with NetNanny which is an internet filtering software, which may also access the firewall?
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  6. YoYo155
    Posts : 3,056
    Windows 10
       New #4

    Istafa said:
    I dont have any other antivirus apart from "windows firewall with advanced security" which came with the operating system but is turned off.

    I am reluctant to delete bitdefender as i am not sure if i will lose the rest of my license as i payed for it.

    I will find out that if you can keep your licence if you re-install and how first.

    Are you sure it isnt to do with NetNanny which is an internet filtering software, which may also access the firewall?
    I don't have a confirmation about that, but if it is like any other program I know of
    the actual installation and license are independent of each other.

    It may be the case are you willing to stop using NetNanny to test things out?
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