Go to the "Start" menu, then choose "Settings," "Control Panel" and "Regional and Language Options."
Click the "Languages" tab, then the "Details" button, the "Settings" tab and the "Add" button.
Choose an input language from the list. You can choose ANY language. For example, if English (US) is the "input language," check the "Keyboard layout/IME" box to select the US-International English keyboard from the list. Click "OK" and close the input window. A language indicator should appear in the System Tray (the area in the bottom right hand corner of the desktop). Switch between input languages by pressing the "Alt" and "Shift" keys simultaneously.
Click "Apply" to finish the process and finalize your choices. You shouldn't need the Windows installation CD for this process.