How to fix error error-thread-mode-not-background in Windows 11

Solution Steps

1. 1 Identify the application causing the error. Open Event Viewer (Windows key + X → Event Viewer) and look under 'Windows Logs' → 'Application' for error code 401. Note the application name. This is the first step to solving the problem.
2. 2 Check for updates for that application. Visit the official website or use the app's update feature. Install any updates and restart the app. Developers often fix such threading issues in patches.
3. 3 If no update is available, reinstall the application. Go to Settings (Windows key + I) → 'Apps' → 'Installed apps', find the app, click the three dots, and choose 'Uninstall'. Then download the latest version from the official source and install it. This can resolve corrupted files.
4. 4 If the error persists, try running the application as an administrator. Right-click the app's shortcut and select 'Run as administrator'. This gives the app more privileges and might avoid the error.
5. 5 If the error still occurs, it might be a compatibility issue. Right-click the app's shortcut, select 'Properties', go to the 'Compatibility' tab, and check 'Run this program in compatibility mode for' and select a previous Windows version (like Windows 10). Click OK and try running the app again.