The Opera Installer error dialog won’t appear again on the next Startup.

Download the Opera for Windows offline installer and run it.

If that doesn’t solve the issue, manually download Opera and update it to the latest version.

Scroll down to the bottom of the tasks list and select “Opera scheduled Autoupdate” which has multiple triggers defined.

Search for the task and select and open “Task Scheduler”.

Opera launches and works fine when browsing websitesįix Opera browser’s Fatal Error upon loading Installer executable.

The error dialog appears only on Windows Startup.

In line 178:The specified procedure could not be found., ” In line 273:The operation completed successfully., In line 304:The operation completed successfully.,In line 273:The operation completed successfully., In line 308: The operation completed successfully. “Fatal error upon loading installer executable. In this article, we’ll tell how to disable the error shown by Opera Installer on Windows startup. The dialog with some line numbers suggests that the operation is completed successfully. With Opera browser installed, whenever you start your PC, you may receive an error from Opera saying Fatal error upon loading the installer executable.

Opera 100.0.4815.30 free