I have a desktop computer that is running Window XP Media Center and Firefox 2 with a broadband connection. The other day, right in the middle of browsing, it just stopped responding. I tried IE 7 and that was giving me the same error message. "Cannot find DNS Server." I still have an internet connection, and can still use Trillian. Everything else internet-related is not working, including email and the Media Center program guide (the dvr is fine but will not work once 2 weeks have gone by and it cannot renew). My laptop tried to pull the same thing, but the next day it was fine, and is able to use the router connected to the broadband modem. All virus scans come up clean. Is there any advise that anyone can give me? I really want my computer back. And I hate to say this, but please keep in mind that I am only marginally computer literate.