Help me pls

:cry: When i installed Avast i have problem
1.) I can’t open web avast(www.avast.com) ,Error is DNS Error : can’t find server
I closed my firewall but it doesn’t matter and when i used other pc that used my router it can open this website.
2.) When I choose update iAVS update , it doesn’t happen anything.

How should i do ?

thank for any suggestion

Why did you install avast, was it perhaps that you had an infected system ?

Have (or did) you another AV installed in this system, if so what was it and how did you get rid of it ?

Also check:
– HOSTS file redirect a common malware tactic to block AV sites making it difficult to remove malware - 127.0.0.1 check your HOSTS file using notepad or a text editor of your choice, C:\WINDOWS\system32\drivers\etc\hosts or do a search for HOSTS to find it if not there.

Once open you are looking for entries with avast.com on the line, you may well see other AV sites, post the contents of the hosts file. http://en.wikipedia.org/wiki/Hosts_file