To maximize the computer screen that opens half page, you need to right-click on the shortcut or menu item that you're using to open a window and move the cursor to the bottom of the menu. Click on Properties >Shortcut > Run and click on the down-arrow of the adjacent drop down menu. Select Maximized, then click on the Apply and OK buttons. The window you had opened will now open in full screen state. If this does not fix the problem, you get a professional to help you out.