Class not registered error while trying to run .jar files RRS feed

  • Question

  • I was trying to run a normal .jar file that I just downloaded and I got the "Class not registered". I've tried a lot of the commands people say to put into the command prompt, but it doesn't help.

    Any solutions?

    Saturday, May 27, 2017 7:30 PM

All replies

  • Hi,

    This error usually occurs if the concerned DLL file has been un-registered. If you face Class Not Registered issue 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.

    For more information, please refer to the link:

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

    Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.

    Best Regards,


    Please remember to mark the replies as answers if they help. If you have feedback for TechNet Subscriber Support, contact

    Monday, May 29, 2017 5:26 AM