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I have gone to Control Panel to ADD/REMOVE PROGRAMS and clicked REMOVE Mozilla Firefox 3.6.13 but the program will not remove.

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The Mozilla Firefox 3.6.13 version is refusing to be removed from my laptop even after l have opened the CONTROL PANEL and clicked on ADD/REMOVE PROGRAMS and then clicked on REMOVE the hightlighted firefox program.

I have just installed the Mozilla Firefox 4.0 and when l try to uninstall or remove this one the same way as l do for Firefox 3.6.13, l have no problem with removing Firefox 4.0.

The Mozilla Firefox 3.6.13 version is refusing to be removed from my laptop even after l have opened the CONTROL PANEL and clicked on ADD/REMOVE PROGRAMS and then clicked on REMOVE the hightlighted firefox program. I have just installed the Mozilla Firefox 4.0 and when l try to uninstall or remove this one the same way as l do for Firefox 3.6.13, l have no problem with removing Firefox 4.0.

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The following link shows how to manually remove Firefox if the uninstaller fails - http://kb.mozillazine.org/Uninstalling_Firefox

Are you sure you still have Firefox 3.6, by default Firefox 4 will replace previous versions of Firefox. Some time the add/remove programs option in the control panel will list programs that no longer exist.