Hi there! I see you're having a problem with Ultrasurf VPN being stuck on connecting indefinitely. I'd love to help get this sorted out.

First, could you tell me a bit more about what happens when you try to connect? For instance:
- Does it stay stuck on "connecting" for a long time, or does it eventually time out with an error?
- Have you recently changed your internet network or firewall/antivirus settings?
- Are you running any antivirus or firewall software that might interfere with Ultrasurf?

Meanwhile, here are some initial steps we can try to get things moving again:

1. Restart Ultrasurf and your PC: Close the Ultrasurf app completely, then reboot your Windows 10 device. This can clear any temporary glitches.

2. Check Antivirus/Firewall Settings: Sometimes security software blocks VPN connections. Temporarily disable your antivirus or firewall, then try connecting again. If it works, you'll need to add Ultrasurf as an exception.

3. Run Ultrasurf as Administrator: Right-click the Ultrasurf app icon and select 'Run as administrator.' This often gives it the permissions it needs to connect.

4. Check Proxy Settings: Ultrasurf uses proxy settings to connect. If you manually set a proxy before, double-check under Ultrasurf’s settings that the proxy host and port are correct or reset them to default.

5. Clear Ultrasurf Cache/Data: If Ultrasurf stores cached data, sometimes clearing it helps. If you see an option in the app to clear cache or reset settings, go ahead and do that.

6. Try a Different Network: To rule out network-specific blocks, try connecting Ultrasurf from a different Wi-Fi or mobile hotspot.

If you've tried some of these already, let me know what you've done, and we can dig deeper into advanced troubleshooting or check for any known service issues.

Would you like me to guide you through any of these steps in more detail?