It is clearly a DNS issue, and as Zen2Go notes, may well be temporary.
I would however suggest that you do a few steps:
. Repair the Winsock service stacks. This is trivial to do, see faq779-4625
. Run IEFIX to make certain there is no DLL registration issue for Hyperlinks:
. Make sure the HOSTS file has not be played with by malware. It is located in %windir%\system32\drivers\etc and is editable with notepad. It should look like this:
# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# 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
**** note there should be an empty line after the localhost entry, and the file must have NO extensions such as .txt