Fix: Class Not Registered error in Windows 10/8/7

Yesterday, we say how to fix the Class Not Registered error in Chrome error message. It may happen that for some reason you may find that you are unable to open Windows File Explorer or any other software on your Windows 10/8/7 system, and you receive the Class Not Registered Explorer.exe error message. If you face this problem and are unable to open Internet Explorer, Edge Cortana or Start Menu, then this post will help you resolve the issue.

Class Not Registered

Class Not Registered

This error usually occurs if the concerned DLL file has been un-registered. If you face Class Not Registered in Windows 10, depending on the application, you may have to:

  1. Re-register ExplorerFrame.dll file
  2. Run System File Checker to replace corrupted ExplorerFrame.dll file
  3. Register DCOM components
  4. Start Internet Explorer ETW Collector Service
  5. Re-register Windows Store apps.

Let us see how to fix this error.

1] In this case, you may need to re-register ExplorerFrame.dll file.

To re-register the DLL file you have to first, open Command Prompt as an Administrator, and then type the following and hit Enter:

regsvr32 ExplorerFrame.dll

One the process is completed, restart your computer. It will search for and replace corrupted operating system files if any are found.

2] If it doesn’t help, then it’s quite possible that your ExplorerFrame.dll may have been corrupted and that you may have to replace it with a ‘good’ one.

Open an elevated command prompt, type the following and hit enter to run the System File Checker:

sfc /scannow

3] Open Run box, type dcomcnfg and hit Enter to open Component Services. Navigate to the following path:

Component Services > Computers > My Computer > DCOM Config.

class not registered windows 10

When you expand the arrow against DCOM Config you may see a message box pop up asking if you want to register some component. Click Yes. It may happen once or multiple times. This will help fix DCOM errors.

4] Run services.msc to open the Services Manager. Locate Internet Explorer ETW Collector Service, right-click on it and select Start. This will help you if you are facing the problem in Internet Explorer or Edge browser.

5] Re-register Windows Store apps and see if it helps.

A System Restore would be the last option to consider.

I am sure something will help you resolve your problem.

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Posted by on , in Category Windows with Tags
Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. comgreen

    [Window Title]

    The module “ExplorerFrame.dll” was loaded but the entry-point DllRegisterServer was not found.

    Make sure that “ExplorerFrame.dll” is a valid DLL or OCX file and then try again.



    Got pop-up window as shown above after tried register. Can advise ?


  2. tanmay

    If it doesn’t help, then its quite possible that your ExplorerFrame.dll may have been corrupted and that you may have to replace it with a ‘good’ one.

    Open an elevated command prompt, type the following and hit enter to run the System File Checker:

    sfc /scannow

    try this
    it should work

  3. Kivi Dzaringa

    I had the the same message” Explorer.exe: :” Class not registered”, Blocking all access to the start menu and Edge browser. To fix it in Windows 10, this will solve the problem:
    1. Ctrl+Alt+Delete to access Task manager.
    2. Click File then click Run new task
    3. First, check the box: Create this task with administrative privileges.
    4.Enter the command prompt
    5.C:WindowsSystem 32> type here: sfc.exe/scannow then hit enter; you will see the system starts to scan till 100% complete. Restart your computer ( You may just press the start button to shut it down then restart) to find out.

  4. Joe Sirico

    Thanks but I could not make this work. In item 4 you say “Enter the Command Prompt”. I did not know what that meant so I typed in C:\WindowsSystem32>. That diidn’t work so then I typed in that plus the sfc.exe/scannow and that didn’t work. What am I doing wrong? I admit to being a 69 year old dinosaur who doesn’t understand.

  5. In Search box type CMD. You will see Command Prompt in the search result. Right click on cmd and select Run As Administrator. This will open the Command Prompt window. To see how to run the System File Checker or sfc /scannow see:

    Or else download our FixWin freeware and click on the Run System File Checker button. Download the one for your OS –

    Windows 10 here >>>
    Windows 8 here >>>
    Windows 7 here >>>

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