Restore iphone 4 from jailbreak failed

I bought an iPhone 4 from a friend.

But he had the iPhone jailbroken, but I thought that was no problem until 1 hour later that I heard

that you can't update the phone + I wanted to reset all his settings and media (factory settings).

So i plugged it into iTunes on PC (SONY VAIO) and pressed restore and later when de updatedata was complete

the screen stayd stuck into the iTunes connect screen (on the iphone). ( it won't go to homescreen etc. )

Can someone help me with this problem please?

I don't know what to do with this.

IPhone: 4 (NOT 4S !)

My iOS Version: 5.1.1