If this happens for all of your program windows could you please try to click the Apple icon then choose System Preferences and select the Displays Panel and choose the Display tab.
Next on the left of the Displays tab you can select a resolution of at least 1024x768 unless you have a specific reason to use a lower resolution.
Once finished just quit or close the System Preferences window and let me know what happens.
Glad that took care of the majority of it.
Can you tell me whaich browser you are using, Is it Firefox?