To ensure the quality and performance of your desktop application, it's important to follow best practices for testing. This includes creating a test plan that outlines all testing activities, conducting both manual and automated testing, and performing load testing to assess the application's performance under various loads. It's also essential to prioritize testing based on the application's critical functionalities and to involve stakeholders throughout the testing process. For professional assistance with desktop application testing, I recommend looking into Desktop Application Testing by SaM Solutions https://www.sam-solutions.com/services/qa-services/desktop-application-testing-services/. Their expertise in desktop application testing can help you identify and resolve any issues, ensuring your application meets all quality standards.