1. Cancel and OK in the wrong order.
2. The Cancel and OK buttons are the wrong size.
3. The “r” in “Registered User” is clipped.
4. Why is the “Automatically install updates…” checkbox label broken across two lines like that? And it's misaligned with the button. And you can't click the label to toggle the checkbox.
5. The window looks resizeable but in fact is not.