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“Class not registered” error in Windows 10 occurs mainly because of the unregistered DLL file of the program you are trying to run. Errors registered in Windows 10 may cause issues such as not being able to open images, video, Excel, Taskbar, uTorrent, PDF, Internet Explorer, Outlook, Microsoft Edge, Windows Media Player, File Explorer, Start Menu, or Cortana. This tutorial will help you fix class errors that are not registered in Windows 10.

How to fix class not registered error in Windows 10

Re-Register or change the ExplorerFrame.dll file:

  • Open the command window (Press Win + R, type cmd and press enter)
  • Type the following command, press Enter and restart your system.

regsvr32 ExplorerFrame.dll

  • This command will detect the operating system DLL files and replace them. In the event that the ExplorerFrame.dll file is corrupt, type the sfc / scannow command and press Enter. This command checks for any changes in the DLL file and makes changes.

Register DCOM Components:

  • Open the component service window (Press Win + R, type dcomcnfg and press Enter)
  • Navigate to the next path, Partition Services> My Computer> My Computer> DCOM Config
  • Double-click DCOM Config, you should receive a few warning messages, click Yes and restart your system.

Internet Explorer ETW Storage Service:

  • Press Windows + R to open Run, type services.msc and press Enter.
  • Find Internet Explorer ETW Composite Service, right-click on it and click Start.
  • Note: Internet Explorer ETW storage service is not available on Windows 10 versions 1607, 1703, 1709, and 1803.

Default Apps settings:

  • If an unregistered class occurs when you are browsing the web using Cortana, open a photo app, try a video or movie, try this tweak to fix the error.
  • To go to the control panel, change the view by the big icon on the right-hand side as the default view. Head over to Default Programs> Set your default program, it will open a new window. Scroll down and find the default settings with Microsoft that were recommended by default, click “Reset”.

Disable iCloud:

  • Open Task Manager by pressing Ctrl + Shift + Esc, right-click on iCloud and select End Task.
  • You can also disable iCloud by starting from the Task Manager window, clicking on the Startup tab and right-clicking on iCloud to close it.

Restart Explorer:

  • If a class with no registration errors occurs while working with Edge, Cortana or the Start Menu, restarting explorer.exe will fix it.
  • Start the Task Manager, go to the Details tab and right-click on explorer.exe, click End Task.
  • Now in Task Manager, go to File> Run new task, a new task popup will appear, type the explorer and click OK.

Author: Nick Jackson

Nick Jackson was born and raised up in Atlanta, is a well qualified technical writer with hands-on experience of technology-related topics as well as non-technical writing.