How to Fix Opera’s Fatal error upon loading installer executable

With Opera browser installed, whenever you start your PC, you may receive an error from Opera saying Fatal error upon loading the installer executable. The dialog with some line numbers suggests that the operation is completed successfully. In this article, we’ll tell how to disable the error shown by Opera Installer on Windows startup.

Here is the complete error:

“Fatal error upon loading installer executable. 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. In line 178:The specified procedure could not be found., ”

What you need to know:

• The error dialog appears only on Windows Startup.
• Opera launches and works fine when browsing websites

Fix Opera browser’s Fatal Error upon loading Installer executable

I.

1. Click on Start
2. Search for the task and select and open “Task Scheduler”
3. Select Task Scheduler Library
4. Scroll down to the bottom of the tasks list and select  “Opera scheduled Autoupdate” which has multiple triggers defined
   
5. Click “Disable”

If that doesn’t solve the issue, manually download Opera and update it to the latest version. Here is how you can do that.

II.

1. Visit the Opera download page
2. Download the Opera for Windows offline installer and run it.

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

In our case, the affected Opera version was 73 dev.

The next update corrected the issue and automatically re-enabled the Opera Autoupdate task in Task Scheduler.

The job of the “Opera scheduled Autoupdate” schedule task is to ensure Opera is always up to date.

Whenever Opera is installed, like Chrome and Edge, Opera adds a scheduled task to periodically check for browser updates at different times in the day.

Have you experienced this error with the Opera browser? Let us know in the comments below.

More on Opera:

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How to Disable Opera browser’s Automatic Video Pop out feature

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