I followed the advice here to completely uninstall and reinstall Avast, but to no use: http://forum.avast.com/index.php?topic=65398.msg552335#msg552335
There appears to be too many posts by this user to uninstall/install as the first suggestion.
I need to know more information to help you:
1. What other antivirus, firewall, and other security software do you
currently have on this system and did you have
in the past? Very often remnants by security software are the culprits for not having other security software work properly.
2. What is your OS, 32 or 64-bit? -- XP SP _?
3. You are using Avast Free 5.0.677 (no question).
4. How do you connect to the Internet? Broadband/cable, DSL, Dial-up, etc.?
5. Have you changed any of the default settings of Avast?
Please try to Repair Avast:
- Go to Control Panel > Add/Remove programs > Avast Antivirus.
- Scroll down and choose Repair function in the pop-up window.
-
Reboot.
Please report back on the above questions, and let me know if the Repair worked for you or not, then we'll take it from there. Thank you.