ITunes and Safari won’t open after automatic update

I allowed a popup message suggesting automatic update of my ITunes and QuickTime to go on. The update was allegedly done as per the message that came back indicating complete update had been done. But to my surprise, since then my iTunes ad safari have completely failed to open. Instead the following error message pops up every time I try opening: ‘’ITunes/safari has encountered an unexpected problem.’’ Reinstalling both have not yielded any help. Kindly assist me.
