It is possibly installed as a plugin, and will be shown and removable from the Windows XP control panel, but it could have more than one component and not have an obvious name. * see http://kb.mozillazine.org/Uninstalling_add-ons * and another thread about this [/questions/874457] You may even need to consider malware checks if the software is being deliberately hidden in which case read *[[is my firefox problem a result of malware]] *and detailed sugestions in [/questions/914980#answer-302372]