hey frends......
im using a adsl connection for internet. when i try to go microsoft.com, avast.com, avg.com.......it says web address cannot be found. i tried on mozill, ie and google chrome as well. bt the result is same. other web sites work perfectly without any issue. im using a zte zxdsl 852 modem and avast 4.7 professional virus guard.
plz help me.....