Need Help Help me plz!

[SteelHeart]

I've installed PR3 and it's working fine except one: I can only see a quarter of the screen on the top left. I've tried lots of time but the result is still the same. I don't know what wrong and it's seem this problem is happened only with me. If someone can solve this problem, please show me how. Thanks!

 

[Keith]

It's not playing in windowed mode is it?