How do you put accent on letters in Windows 7?

To add accents to letters in Windows 7, you can use the Alt key with numeric codes on the numeric keypad. For example, holding down the Alt key and typing 130 will produce é, while 136 will produce ê. Alternatively, you can set up a different keyboard layout (like US-International) through the Control Panel, which allows you to use specific key combinations to easily type accented characters.