"no site configured at this address" when I click on just started about 1-2 weeks ago

I am really a novice- old hippie type. I set up buttons on my desktop so i could get easily to my favorite places. Win 7 Prof - I accept all updates to Win 7 and Firefox.Home page is google/firefox. No matter where i try to access yahoo from- google search, then clicking on the web page; logging out of mail account, or clicking on yahoo pictures, i get the same error message. I did check with a technically literate friend and she gave me a suggestion that i try another link like and erase the "news" part and see if that would work. I got the same error message. I just dont know what else to do. BTW i will NOT be downgrading to Win 8. If you need more info, pls remember i am a serious novice . I really would appreciate any help y'all can give me because i miss yahoo. the old L.A. hippie chick

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