As a desktop support engineer, you can follow these steps to troubleshoot application errors and crashes on a desktop computer:

1. Update the application: Make sure the application is up to date by checking for updates through the application’s update manager or on the software developer’s website.
2. Check for compatibility issues: If the issue occurs when using a different device or operating system, try using a different device or operating system to see if the issue is with the device, operating system, or the application.
3. Reinstall the application: Sometimes, reinstalling the application can resolve the issue. You can reinstall the application by uninstalling it from the operating system’s control panel and then reinstalling it from the software developer’s website.
4. Disable add-ons and plugins: If the application has add-ons or plugins, try disabling them to see if they are causing the issue.
5. Clear cache and temporary files: Clearing the application’s cache and temporary files can sometimes resolve the issue.
6. Check for malware: Run a full system scan using a reputable antivirus software to ensure that the application error or crash is not due to a malware or virus infection.
7. Contact the software developer: If the above steps do not resolve the issue, consider contacting the software developer for assistance.

It’s important to regularly backup important data and settings to protect against data loss from application errors and crashes. Additionally, make sure the computer meets the minimum system requirements for the application to prevent compatibility issues