I am using IE8 on Win/XP . I use Mozzila Thunderbird (MT) and Eudora alternately for email . In order for IE8 to know which email program to use as the default , it needs to be set in two places: (i) in Windows in the Start menu and (ii) in IE via Tools and the path Options then Programs . If I set it to MT in these 2 places all is OK . If after this , I once use Eudora , it resets it in ii) to Eudora . Have looked in Eudora , but can't find any parameter for this . Can someone help please ?