Hi! I see that your Avast Secure Browser won’t open on your Windows 10 device. Let’s work through this together and get it running for you.

To start, could you tell me if you see any error messages at all when you try to open the browser? Also, do you recall if this started happening after any Windows updates or changes to your system recently?

Meanwhile, here’s a straightforward process to try that usually helps with this kind of problem:

1. Restart Your PC – Sometimes a simple restart resolves temporary glitches.
2. Repair Avast Secure Browser:
- Click the Windows Start icon and open Settings.
- Click Apps or Installed apps.
- Find Avast Secure Browser in the list and select it.
- Choose Modify or Repair if available.
- Follow the prompts and then restart your computer.
3. Check for Conflicting Apps – Make sure no other browsers or antivirus apps are causing conflicts by closing them completely.
4. Uninstall and Reinstall if repair doesn’t help:
- Go to Apps, select Avast Secure Browser, and choose Uninstall.
- Restart your PC.
- Download the latest Avast Secure Browser installer from the official Avast website and install it fresh.

If after doing these steps it still won’t open, we can look into deeper issues like permissions, Windows services conflicts, or profile corruption.

Does this sound doable for you? Let me know what you’ve already tried or if anything stands out when you attempt to launch the browser. I’m here to help!

[Sources: Avast support articles on repair and troubleshooting Secure Browser]