Things to try -
from the network connection properties for TCP/IP add these DNS server addresses:
8.8.8.8
8.8.4.4
Both are Google public DNS servers - it does no harm to have additional DNS servers selected.
Can you connect to either
google.com or google.com's IP address
209.85.229.104 with FF or IE?
From the command prompt (best to use an elevated cmd as administrator if using Vista or Win7)
ping google.com
ping 209.85.229.104
the results should be the same if all is OK with the DNS resolution
also run
ipconfig /flushdns
from the command prompt, which flushes the DNS cache, unsurprisingly, getting rid of possibly corrupted DNS data.
If there are still anomalous results, check that
%systemroot%\system32\drivers\etc\hosts has not been rewritten to misdirect google.com etc., to some other IP address.
If it has a lot of entries (more than the entry below), rename the file, and create a new file in notepad simply called
hosts to replace the file you have renamed.
Copy the following into the file (only the last line is necessary) and save in the above folder:
Code:
# Copyright (c) 1998 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP stack for Windows98
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
# For example:
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
127.0.0.1 localhost