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Mohammed Ullah's avatar
Mohammed Ullah
Brass Contributor
Jul 05, 2020

Windows could not connect to the System Event Notification Service service

Symptom:

Are you unable to log in with your Standard User account on Windows?

 

And even when you log in using an administrator account, you find this error message:

 

“Windows could not connect to the System Event Notification Service service. This problem prevents standard users from logging on to the system”

or 

“Failed to connect to a Windows service. Windows could not connect to the System Event Notification Service service.”

Active Directory
Standard User
windows
Windows Server
  • Mohammed Ullah's avatar
    Mohammed Ullah
    Brass Contributor
    Jul 08, 2020
    Solution:
    1- Restart and/or Enable System Event Notification Service, Windows Font Cache Service, DHCP Client Service.
    2- reset the Winsock Catalog (c:\>netsh winsock reset)
    caution: applied to win7 only, before run above winsock command, run below two commands first:
    @echo off
    REG ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows" /v LoadAppInit_DLLs /t REG_DWORD /d 00000000 /f
    REG ADD "HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Windows" /v LoadAppInit_DLLs /t REG_DWORD /d 00000000 /f

    3- update video card drivers
    4- uninstall the Widows KB2952664 update
    List installed version of the update:
    dism /online /get-packages | findstr KB2952664

    Remove one by one the versions:
    dism /online /remove-package /PackageName:Package_for_KB2952664~31bf3856ad364e35~amd64~~6.1.1.3

    Confirm everything is gone:
    Get-HotFix -id KB2952664
    It should display a cannot find hot-fix error.

    5- Task Manager > Startup tab > Disable klhkum.dll process.
    6- optimize Windows for faster performance
    a. run Troubleshooter: Control Panel > Type troubleshooter > Select Troubleshooting > Go to System and Security> click on Check for Performance Issues.
    b. Disk Defragmentation
    --

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