Hi! I have been having this on going problem with an error message everytime I go to send an email from within another program what it says is I must set up a default email program so I do. I go into explorer, tools & internet options & change my default email program to mozzila thunderbird. Everything works fine for a day or so & then explorer defaults me back to outllook as the default mail program & then the errors start again. Whats with that! Anyone else run into this. Sure would like to know if there is a fix for this. Seems like an attempt by microsoft to hog this operation. Any ideas would be greatly appreciated. Using win xp pro! TIA!