Itunes isn't loading, I just get an error message from windows

This just started yesterday, and it's only happening on one of my computers. The other one works fine. The one that is having a problem is doing this. I click on the icon to start iTunes, and I get a window saying "iTunes has encountered a problem and needs to close. We are sorry for the inconvenience". Then it asks me if I want to send an error report to microsoft. I've uninstalled iTunes, reinstalled it, etc and it still does this. Help? Please?