Is there any other security program that could be interfering? Old antivirus, firewall, etc.?
Everything is working fine here...
Maybe trying an installation repair or even an installation from scratch:
1. Download the latest version of
avast! Uninstall Utility and save it.
2. Download the latest
avast! version and save it.
3. (Optional) If you want, save your avast! settings for later restoration (Settings > Maintenance > Back up).
4. Uninstall avast! from Control Panel (if possible) and reboot.
5. Run the avast! Uninstall Utility saved on 1 in and
follow the instructions. Reboot Windows in Safe Mode, uninstall avast! and then reboot in Normal Mode again.
6. Install avast! using the setup saved on 2. Register your free copy or add the license key for the paid versions. Boot.
7. Check and post the results.
Please, be patient, boot when it's said to boot...