What to do if the Windows 5UF app cannot start or has cache issues

If the Windows version of 5UF APP does not respond, crashes, gets stuck, or fails to open, the cause is often damaged local cache data.

Recommended steps:

1. Fully exit 5UF VPN and make sure no tray icon remains.
2. Open C:UsersYourWindowsUsernameAppDataRoamingcom.top.wuf.
3. Delete the cached files in the com.top.wuf folder.
4. Restart the computer.
5. Right-click 5UF VPN and choose Run as Administrator.

If it still cannot start, contact support and provide your Windows version, device model, screenshot of the error, and the time when it happened.

If you are still using an older client, we recommend switching to the latest 5UF VPN app for better stability and compatibility.