Windows Explorer says iPhone has stopped responding or is not connected?

I just jailbroke my iPhone to use PPSSPP, but when I try to go to my phone with Windows Explorer, it says the it's not working. My phone is working perfectly otherwise, and I've restarted it with no change. Anyone know what's wrong?

I can't understand why people spend LOTS of money on an iPhone (much more than any other equivalent phone), and then deliberately ruin it by jailbreaking it.
The whole point of the iPhone is the software and hardware are tightly tied together, and work together, and have been tested together, and you know you are getting some thing that works.

And then you go and break it?

Not to be rude at all, but why the heck would you wanna jailbreak, yeah I get it its cool but really.