svchost.exe - no disk problem after removing cd

everytime i remove a cd from any of my 2 drives, i get a popup saying there is no disk in the relevant drive. it pops up every 5-10 mins. the only way get it to stop reappearing is i open up exact audio copy and then click the cancek button and it doesnt pop up again until i put a cd in and take it out again. dont know what caused this but ive left it for a few months now..im not online so its not the internet messing things up. please help! thanks.