Websites are not opening after avast installation

General Topics
1

I recently installed Avast internet security to my system. After installing it I am not able to open any websites.
Each time I need to go to avast safe-zone and open the sites.
Please help me with this issue?

2

Firewall? (delete the rules so to recreate them, adding at least avastui.exe and avastsvc.exe)

OS? SP?

3

What AV did you have before installing avast ?
have you removed it ?
have you run a removal tool to clear any leftovers ?

run and reboot - Uninstallers for Security Software
http://thewebatom.net/uninstallers/security-software/

4

I was using Avira AV earlier.

5

http://www.avira.com/en/support-download-avira-registrycleaner