In addition to what was already posted, if that does not fix your problems, please check the following:
1. Did you upgrade or do a clean install to this version of Avast? Exactly what version do you have? If the Avast Repair does not work, you will need to uninstall AIS and do a clean install, but we first need to know the answers to # 2 & 3 below as remnants for previous security software can cause conflicts and we can help you uninstall these and fix your problem.
2. What was your previous firewall on this machine and how did you uninstall it (other than Windows firewall)?
3. What were your other security software (antivirus, trial version software, other security software) both currently and in the past on this machine?
4. Once you get the firewall enabled, does it allow avastSvc.exe internet access?
- If it does, delete the entry for it and reconnect to the Internet. This should force the firewall to ask permission again.
You can also check this for additional information on using AIS:
http://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=482&ratingconfirm=1Please let us know if you have additional questions. Thank you.