Hello i have a windows XP (Windows vista capable) and i changed the font size for my computer in the DPI setting i made it really big and now none of the windows i bring up fit on the screen correctly so i tried to go back to the DPI settings again to change it back and i can not get to the apply button to change the setting back the apply, OK, and cancel buttons are off the screen and when i try to drag the screen up to see the buttons at the bottom i cant get to them and i can not minimize or make the window any smaller then it is please helpppp!!!!!!
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Alt+Space, M will allow you to move windows around using the arrow keys.
If that doesn't wor for you, boot into Safe Mode and reset the DPI settings from there.