You can turn on sounds for inadvertent pressing of the Caps Lock key, Num
Lock key and Scroll Lock by going into Control Panel, select Ease of Access
Center, click on Make the keyboard easier to use and then click on Toggle
Keys. Save it. Press the Caps Lock key and you should hear a sound. If
not, press and hold the NumLock key for at least 5 seconds. You should see
a message asking if you want Toggle Keys turned on.
As I am a touch typist, I use this feature repeatedly when I am tabbing and
miss the tab key (fingers are starting to get old) but turn on the Caps Lock
key by mistake. Lets me know that I have turned on the key.
Hope this helps, let us know.