calc pop ups!!

im running xp home edition,when my system boots up. the calculator automatically pops up.then another one opens,it goes on and on until i have like more than 80 calc pop ups.its really annoying, i have tried to delete the calc from my program files and this wont help.ran anti-virus and spyware software, nothing harmful was found. is there a way i can kill my calculator pop ups and put it rest for good? im really tired of xp’s venerabilities!!