How to Change the Size of Your Font
The Windows operating system installs with a default font size. If you increase the screen resolution on your computer, the font and windows are smaller. You can manually set the font size on your computer using the display settings in the Windows Control Panel. This increases the size to make the window and desktop text easier to read.
Right-click the Windows 7 desktop and select "Personalize." This is the shortcut to quickly open the display configuration utility.
Click the "Display" link in the left-hand pane. This will give you the option to make size changes. Select "Medium" to make your text 125 percent larger, or click "Larger" to make your text 150 percent larger, and click "OK."
Click "OK" to save your changes. The text on your Windows desktop will be increased immediately.