It would be better if you open your own thread… here, advices for you and aznbook could be messed.
When you start a new thread, please, post more info:

  • Which OS are you using? Is it up to date?
  • What avast! version?
  • Do you use a firewall? Which one?
  • Do you have any other antivirus installed in your system? How did you uninstall it before installing avast?
  • Any other security programs that could interfere?
  • Any useful information into Control Panel > Administrative Tools > Events, specially ‘Errors’.