My iPhone 4s refuses to sync with my iTunes?

I have a new iPhone 4s, and I restored it from a previous backup. Now, after that, I plug it into iTunes and when I click on my device tab, it shows a blank white screen with no summary or anything. It also can't access iTunes, and I have the latest version of iTunes as well. My phone refuses to sync with my account, and I've tried so many things. If anybody could help me, that'd be wonderful

Reboot your PC and try it again.