Help please! Internet Problem

yestrday i made a clean install of windows 7 build 7600.
My problem is very wierdly i can connect to the internet thru my wireless network no problem. I can surf most sites no problem. But the problem is all of the anti virus programs (kaspersky, nod32) spyware detectors(ad-aware, antisuperspyware) i tried, When they try to update their database, They can not connect. Also for windows update it can not connect. I tried turning of firewall, didnt help.(i dont have anything else other then windows standart firewall) I searched for viruses thinking maybe its kind of virus but nothing. How can i fix that its very annoying thanks.

i discovered something that maybe helpful to understand what the problem is.
When i ping those update server for example u20.eset.com
it doesnt resolv the ip instead it resolves as 127.0.0.1 and the answer comes from 127.0.0.1 from my own computer.

darkassain said:

can you check your hosts file?
its in C:\Windows\System32\drivers\etc
it called "hosts"
open it with notepad (you are going to have to first open notepad with admin privileges and then open that file) and you should see a bunch of addresses...
delete them and that should allow you to update...
delete everthing after this part

Code:

 # localhost name resolution is handled within DNS itself.
#    127.0.0.1       localhost
#    ::1             localhost

thnaks.
i opened it but it already ends like you wrote there is nothing else to delete after that.

sorry everyone for taking your time. Problem solved.
i just changed my dns servers to opendns servers and problem solved.