Avast error:10050

Zsaurein Posts 6 Registration date Monday May 6, 2013 Status Member Last seen May 29, 2013 - May 15, 2013 at 06:58 AM
Hp mini: Win7

After installing avast it says: Please check that the avast service.. (AvastSvc.exe is not blocked by your personal firewall) What I need to do? In addition, we cannot access internet in this laptop ) thank you!