how do i fix itunes error 2503

hi all need some advice when i went down to load new coppy of itunes on my windows 8 pc .i got this message error code 2503, so i went in to the controll panel and tryed a remove and it came up wtith the message error code 2503. and said something bout fatile error i tryed to do a repair too and got the same message besids taking it to my pc teck how do i do it my self ? .. any help be appreated