I have had a problem. I have had a problem with itunes that was already on my computer.On clicking

Question

I have had a problem with itunes that was already on my computer.On clicking the ikon on desck top,it came up with(the instuction"0x0bef5040l"referanced at "0x53002004" could not be read).Iwent to itunes onthe web thay dvised me to unistall and download a up date.This was done but the message sistill the same.My Computer is a toshiba 200/a-microsoft Windows XP-Version2002-sevice pack .genuin intel (r)cpu-T2080@1.73ghz-1.73 ghz ).99ram.