1. Install Avast VPN:

   Visit the Avast website (https://www.avast.com) and download the latest version for your operating system (Windows, macOS, or Linux).

2. Log In:

   Go to the Avast website and sign in using your email, social media, or a username/password.

3. Configure Your Account:

   In Chrome, go to the settings (three dots > Advanced settings), then select "Block unknown sources." Check this option and apply the changes.

4. Select a VPN Server:

   Visit a relevant server site (e.g., OpenVPN or Vnetunblock) and log in. Connect to the server and revisit the address bar to see blocked or unblocked messages.

5. Configure Browser Settings:

   Return to Chrome, ensure "Block unknown sources" is set up, and type a website to visit. Check for "Not blocked" messages.

6. Adjust DNS Settings:

   Log into a DNS server (e.g., OpenDNS) and type your DNS address. Configure unknown protocols and domains to block unblocking issues.

7. Test Your Connection:

   Connect to the DNS server, use the address bar to visit websites, and check for blocked messages.

8. Uninstall Software:

   Visit the Avast website and click "Uninstall" to remove the installation file.

9. Practice with Simple Websites:

   Visit a few search sites online to test if they're blocked, ensuring everything works before proceeding.

By following these steps, you'll successfully set up Avast VPN and begin using it to block unwanted websites and services.