Free Download For Default Mail Client Proerloy Installed?

every time i want to go to email address on a page i get this and i so tired of it now that i,am thinking of giving away my computer and just for get the dam enternet ! but i keep get this reply every time ? defaut mail client property installed ? . won,t let me use the e-mail i put the pionter on -a page ! it say not properly installed ? how do i get this out of my hair? and yes i new to the enternet realy and always learning ! the hard way and do not like too ask for help , a man thing . thats why when a man gets lost he realy is lost