Find a file named hosts (it's in c:\windows for 95/98/me and in c:\windows\system32\drivers\etc in xp), rename it, reboot and see if that makes any difference. Note: it's hosts without any extension, just hosts, not hosts.txt or hosts.sam or something like that.
If it makes no difference, open a command window and ping the site, like ping reviews.cnet.com (+ enter). See if it responds.
Post your findings, and the url's of a few of such sites to see if the names ring a bell.
Have two computers; one at home and the other at work. The home computer start about two months ago, when clicking on different links on various web pages IE only goes to a blank page. Now the computer at work is doing the same thing. Have reset web default settings, run adware, spybot and virus programs...still the same result. Tired to restore system but it will not let me. Any help will be appreciated.