If you encounter an error message stating 'a JavaScript error occurred in the main process' or 'a fatal JavaScript error occurred' while attempting to launch or install Discord, there exist multiple potential solutions. While these solutions are primarily tailored for Discord, they should be applicable to resolving similar errors encountered in other applications, such as Microsoft Teams. Below, we outline the steps to troubleshoot JavaScript errors for Discord, Microsoft Teams, and other Windows 10 apps.
Procedures
Removing Restrictions in Your Antivirus Program

Access your antivirus or antimalware software. If you're encountering difficulties installing Discord or any other application due to a JavaScript error, such as 'a JavaScript error occurred in the main process,' your antivirus software might be obstructing the installation process. This can be rectified by adding an exclusion for the installer.
- If you're utilizing Windows Security, included with Windows at no cost, input security into the search bar and select Windows Security.
- The subsequent steps will guide you through unblocking an installer using Windows Security, although the menu options in your antivirus suite may vary.

Navigate to the Virus and threat protection section. This provides an overview of your antivirus settings.

Press Manage settings. This will open up the settings for your antivirus protection.

Include an exemption for the Discord installer. If you're utilizing Windows Security, select Add an exclusion, opt for File, and then browse your download directory to choose DiscordSetup.exe (or the relevant name of the installer you wish to execute).

Execute the installer once more. Once you've granted permission for the installer to execute, you should no longer encounter JavaScript errors during the installation process.
Clearing AppData and Reinstalling

Shut down Discord (or the application you're attempting to rectify). If you encounter a JavaScript error while trying to launch or install Discord or any other application, it's possible that the application data has become corrupted. Ensure that the application is not currently running, and close it properly to facilitate a complete deletion and reinstallation. Ensure it's not minimized in your taskbar.
- To ensure closure, press Control + Alt + Delete and select Task Manager. If you observe that the application is active, select it and then click End Task.
- Even if your installation attempts were unsuccessful, it's advisable to follow this procedure before retrying the installation.

Press ⊞ Win+S. This will activate the Windows search bar.

Type %appdata% and press ↵ Enter. This will open a File Explorer window to your application data.

Permanently remove the folder for the application you're attempting to rectify. For instance, if you're addressing issues with Discord, you should delete the 'Discord' folder. Here's how:
- Select the folder by clicking on it once. Do not open the folder—simply select it at this stage.
- While holding down the Shift key, press Delete.
- Confirm by clicking Yes.

Press ⊞ Win+S. This will activate the Windows search bar once more.

Enter %LocalAppData% and press ↵ Enter. This action will open a File Explorer window to your local app data.

Delete the app's folder permanently from here as well. Simply hold down the
Shift key while pressing
Delete, then confirm the deletion.
- If you cannot locate this folder, proceed to the next step.

Remove Discord (or the specified app) from your PC. Here's how:
- Access the Windows menu and select the Settings gear.
- Navigate to Apps > Apps & features.
- Choose the app and click Uninstall. If the app is not listed, proceed to the next step.
- Confirm by clicking Uninstall.

Reinstall the application. For Discord reinstalls, obtain the installer from
https://discord.com/download. After downloading, double-click the installer and follow the prompts—this should resolve most installation issues.
Fixing Microsoft Visual C ++ (Microsoft Teams)


- While this approach is acknowledged for its effectiveness with Teams, it may also address similar issues encountered in other applications.

Access Apps. This action will open the Settings panel to the list of Apps.

Access Apps & Features. This selection is located in the left panel.

Choose the most recent version of Microsoft Visual C++. Within this section, you will likely encounter multiple instances of Visual C++; opt for the one with the latest date.

Opt for Change or Advanced options. These choices will be available here.

Choose Repair. This initiates several repair steps for the C++ libraries.
- If prompted, input your administrator password for confirmation.

Attempt to execute the installer again. This action should effectively resolve most JavaScript installation errors encountered with Microsoft Teams on Windows 10.
Executing the App as Administrator

Shut down Discord (or the application requiring repair). If encountering a JavaScript error while launching Discord or another application, specific processes might fail due to insufficient permissions. If the application is currently active, ensure to close it. Verify it is not minimized to the taskbar.
- To confirm closure, press Control + Alt + Delete and select Task Manager. If an application process is running, select it and click End Task.

Right-click on the Discord icon located on your desktop or within the Windows menu. This action will prompt a menu to appear.

Choose Open file location. If this option isn't visible, you might need to click More first. This action directs you to the application's installation directory.

Double-click the most recent version of Discord. If you've performed multiple updates for Discord, you may encounter several folders starting with
app- and ending with a numerical value. Double-click the one containing the latest version number.
- If troubleshooting a different application, you'll typically find it within the opened folder. Otherwise, search for a file with the application's name, often ending with '.exe.'

Right-click the application and choose Properties. This action reveals the properties for the selected application.

Click the Compatibility tab. This tab is located at the top of the window.

Tick the checkbox next to 'Run this program as an administrator.' Enabling this option grants the application permissions across your PC, potentially resolving issues related to access rights.

Click OK. This action applies and saves your modifications.

Launch Discord or your preferred application as usual. With the administrator privileges now set, launching the application by double-clicking its icon on the desktop or in the Windows menu will initiate it with elevated rights.
Pointers