Firefox 3.5 was downloaded fine, but when I try to open firefox page, "the application failed to initialize properly" error sign comes up.

I've been using firefox fine until now. But when I launched firefox page today, suddenly "The application failed to initialize properly (0xc000007b). Click on OK to terminate the application." error sign came up. So I downloaded and ran firefox again, and tried lauching, the same error message. Thank you for your help.

Try:
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

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