First of all update Firefox, you appear to be using Firefox 5 which is old, unsupported, and not secure. * obtain a copy of the installer from <br />http://www.mozilla.org/en-US/firefox/all/ ** there is no need to uninstall Firefox first. Do NOT use any option to remove personal data as that will destroy bookmarks and passwords. *an alternative easier method that may work is to use <br />'''Help -> About Firefox -> []check for updates''' I am guessing the ''AVG browser'' is some sort of toolbar or Firefox extension. Please see #[[Remove a toolbar that has taken over your Firefox search or home page]] #(CARE ! ) Thread "How to remove AVG Secure Search the manual way" [/questions/936670] Try the first method initially. The second method may not be applicable in your circumstances, and involves direct editing of the registry, something to be avoided unless there is no alternative.