rwilhelm,
I am sure your puter is fine...
What you need to do is get Internet Exploder up so you can change your default start page. The only "problem" is that the Cox page seems to be your default so you will have to open Exploder by:
1) Click START
2) Click Run
3) Type the following: IEXPLORE
www.yahoo.com
4) Click Ok
Then you should be able to click "Tools," on Exploder's menu, then Internet Options and set your default start page to something other than the Cox page.
Hope that helps!
Rob