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How to Fix “A JavaScript error occurred in the main process” on Discord

Are you getting the “A JavaScript error occurred in the main process” error when you you’re trying to install Discord?

Here’s an example of the full error, “A JavaScript error occurred in the main process. Uncaught exception: Error: Object has been destroyed at Function<anonymous>”.

The error message is different for everyone, so you might be getting a different error message from the one above.

But the steps to solve the error remain the same.

JavaScript and installation errors are common for Windows 10, and many users have encountered it before.

Fortunately, with communication apps like Discord and Skype, installation errors can be easily fixed.

In this guide, you’ll learn why you’re getting a JavaScript error when installing Discord.

You’ll also learn how to fix the error in 4 easy steps.

Why am I getting a JavaScript error on Discord?

A JavaScript error occured in the main process

If one or more files are corrupted, you won’t be able to install Discord on your computer.

You’re getting a JavaScript error on Discord because its files are corrupted.

The JavaScript error is common for Windows 10, and many users have faced it before.

If you’re trying to install another communication app like Skype, you might encounter the error message as well.

When that happens, the course of action that you need to take next is by reinstalling the app.

But before that, you need to delete all of its existing folders.

Otherwise, you’ll get the “A JavaScript error occurred in the main process” error when you try installing Discord again.

How to Fix “A JavaScript error occurred in the main process” on Discord

To fix “A JavaScript error occurred in the main process” on Discord, you need to end it in the Task Manager, delete its folders from %appdata% as well as %localappdata%, and re-install Discord again.

You need to “End task” for Discord in the Task Manager and delete all of its existing folders (from roaming and local) in order to install it on your computer without any errors.

To begin with, you need to end the task for Discord on the Task Manager.

This is because the Discord process is still running in the background on your computer.

If you don’t end the task for it, you won’t be able to install Discord.

Next, deleting its folders is important as you don’t want Discord to exist anywhere on your computer.

These files might be corrupted as well.

After you’ve ended the task for Discord in the Task Manager and deleted all of its existing folders, you can install Discord again.

Here’s how to fix “A JavaScript error occurred in the main process” on Discord:

  1. End Discord in the Task Manager
  2. Go to %appdata% and delete Discord
  3. Delete Discord from %localappdata%

1. End Discord in the Task Manager

Fix "A JavaScript error occurred in the main process" on Discord

Open the Task Manager (using Ctrl + Alt + Delete) > Right-click Discord > End task.

Firstly, you need to end the task for Discord in the Task Manager.

This is to ensure that Discord is not running in the background of your computer which may cause issues when you try to install it again.

There are several ways you can open the Task Manager on your computer.

The easiest way is to press “Ctrl + Alt + Delete” on your keyboard.

That will bring up the Task Manager.

Alternatively, you can search for the Task Manager in the Windows Search bar (on the taskbar) and open it.

Once the Task Manager is opened, find the Discord app and end the task for it.

Right-click on the Discord app and select “End Task” to end its task.

After you’ve ended its task, the Discord process is not running in the background of your computer anymore.

Now, you’re left with deleting the existing Discord folders on your computer in order for you to successfully install it on your computer.

2. Go to %appdata% and delete Discord

Delete Discord from appdata to fix "A JavaScript error occurred in the main process"

Navigate to %appdata% on your computer > right-click “discord” > delete.

Secondly, you need to go to appdata and delete the “discord” folder there.

As the “A JavaScript error occurred in the main process” is caused by corruption, you need to delete Discord’s existing folders to successfully install in on your computer.

In order to go to the appdata folder, type “run” in the Windows search bar (on the taskbar).

Then, search for %appdata% in the run search bar and press enter.

After that, the roaming folder will open.

Find the folder named “discord”, which will most likely be in small caps.

Right-click the folder and delete it.

You’ve successfully deleted the first existing folder for Discord on roaming.

Now, you need to delete the Discord folder from localappdata.

3. Delete Discord from %localappdata%

Delete Discord from localappdata to fix "A JavaScript error occurred in the main process"

Navigate to %localappdata% on your computer > right click “Discord” > delete.

Thirdly, you need to delete the existing Discord folder on localappdata.

This is the last folder that you need to delete in order to successfully install Discord on your computer.

Firstly, type “run” in the Windows search bar (on the taskbar).

Then, search for %localappdata% on the search bar of run and press enter.

The local folder will be opened which contains several folders of various applications that you’ve installed in the past.

The folder that you need to delete is the “Discord” folder (this time capitalized).

Right-click the “Discord” folder and delete it.

You’ve successfully ended the task for Discord and deleted all of its existing folders.

Now, all that you’re left with is to re-install the Discord app on your computer.

4. Re-install Discord

Discord login

Navigate to Discord.com > Download for Windows.

Finally, you need to re-install Discord on your computer again.

Go to Discord.com and click on the “Download for Windows” button.

Follow the on-screen instructions and wait for Discord to install.

Once it’s done installing, a login screen will be opened.

This time, you won’t encounter the “A JavaScript error occurred in the main process” while installing the application.

Log in to your Discord account and start using the app on your computer.

Congratulations, you’ve successfully fixed the JavaScript error on Discord!

Conclusion

JavaScript errors can be frustrating when you’re trying to install an application on your computer.

Discord and Skype are the two known communication applications that have installation issues.

Fortunately, the issue can be easily fixed using the 4-step process in this guide.

If you’re encountering installation issues for other applications in the future, you can try using the same process to fix the error.

This is because installation errors like the “A JavaScript error occurred in the main process” error is most likely caused by corrupted folders/files.

After you’ve ended the task for the application in the Task Manager and deleted all of its existing folders, you should be able to install the application on your computer without encountering any errors.

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About the author

Lim How Wei

Lim How Wei is the founder of followchain.org, with over 7+ years of experience in Social Media and 3+ years of experience in investing in stocks and cryptocurrencies. He has researched, tested, and written hundreds of articles ranging from social media platforms to messaging apps.