I have been using a Dell keyboard for many years, ```````````````````````````````````````````````````` I have a Dell keyboard mdl SK-8135 that I have been using for many years. The one feature I liked was the fact that it had an email hot key along the top of the keyboard that would open my Thunderbird email. Recently however that button when depressed opens my browser and not Thunderbird. I'm not sure why this is happening but I would appreciate any help or suggestions as to what I can do to get this dedicated key to once again open Thunderbird. I guess it would help if I mentioned that I am currently using Windows10. Thank you all.