Fix an app that will not open
Use a safe repair sequence before reinstalling an application.
- Close the app fully and restart the device.
- Install trusted application and operating-system updates.
- Back up app data before resetting or reinstalling.
NUNX technology guide
Software and Application Help
Repair applications, uninstall software safely and control which programs open your files.
Practical starting points
Clear answers to common problems.
Uninstall software completely
Remove unwanted software without deleting shared files or leaving subscriptions active.
- Export needed projects and personal data first.
- Use the operating system’s Apps settings.
- Cancel paid subscriptions separately when required.
Change default applications
Choose the browser, PDF reader, photo viewer or media player used automatically.
- Open the system’s Default apps settings.
- Select by application or specific file type.
- Test one normal file after making the change.
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