To resolve the issue of your connection dropping after only 4 seconds when using Trace Bust, follow these actionable steps:

1. Check Your Internet Connection:
Ensure that your device has a stable internet connection. Unstable connections can lead to frequent disconnections. You can do this by restarting your router or modem.

2. Update Your Application:
Make sure you are using the latest version of Trace Bust. Outdated software can have bugs that result in connection drops. Visit the App Store, and check for updates.

3. Restart Your Device:
Sometimes, simply restarting your device can solve connectivity issues. This will clear any temporary glitches that might be affecting the Trace Bust app.

4. Adjust VPN Settings:
Check the settings in Trace Bust. Make sure your VPN settings are properly configured:
- Disable any protocols that might hinder connections.
- If available, enable the 'keep-alive' feature to maintain the connection.

5. Firewalls and Antivirus Settings:
Review your firewall and antivirus software settings. They might be blocking or interfering with Trace Bust’s connection. Consider disabling them temporarily to check if the connection stabilizes.

6. Reinstall Trace Bust:
If the problem persists, uninstall and then reinstall the Trace Bust application. This process may eliminate any corrupted files causing connection issues.

7. Contact Your Internet Service Provider (ISP):
If none of the above steps work, contact your ISP. There may be an issue with your internet service that is impacting VPN performance.

8. Troubleshoot Further:
If disconnections continue, consider running a continuous ping to a reliable server to diagnose network stability issues. This may reveal if other network problems exist.

9. Seek Community Support:
Engaging with online communities may provide additional insights. For instance, users on forums have reported similar experiences, which could offer further solutions tailored to your issue - learn more - learn more.

By following these steps, you should be able to stabilize your connection with Trace Bust and eliminate the issue of it disconnecting after four seconds. If the issue persists after trying these solutions, professional technical support may be beneficial.