A user usually tends to hit the [Caps Lock] key while typing.
This could be quite irritating especially when you have typed a long message in 1M and later realize that [Caps Lock] was on thus making you type the entire message again.
You can have Vista alert you through a sound notification when [Caps lock] is turned on.
To do so follow these simple steps.
Click "StartlControl Panel".
Double-click the "Accessibility Options" icon.
The "Accessibility Options" dialog box will appear.
Under the "Toggle keys" section, select the "Use ToggleKeys" check box.
Click "Apply" and then "OK".