Xp Windows window sizing problem

Hello, this is my first time posting because I am having trouble finding a solution to my problem. My problem is that almost every program I open in Xp is opening in half-sized windows. My games are the only exception. I can't maximize them, such as itunes, and I cant even stretch them, with firefox being the only exception. I've restarted my computer, I've tried stretching Firefox to the desired size then exiting and reopening it, but to no avail. Even my control panel window is half the size. Any help will be appreciated!


Blaise23