This is really annoying when you can’t open the Settings App to go through different features, apps, settings, security, personalization, and many more. This error occurs irrespective of Windows 10 Version, it can happen with older versions or even with newer versions like 1903, 1909, 2004, or Windows 10 20H2. Settings not opening on Windows 10 is a common issue reported by thousands of users. Windows 10 settings app may get corrupt due to a Windows update, conflicting programs, or incorrectly uninstalled apps and it refuses to open at all.