If you have a keyboard which doesn’t have a led indicator or led’s are malfunctioning then in such a situation the Application Keyboard Indicator can be very useful. Keyboard Indicator is an easy to use indicator for the Num Lock, Caps Lock, Scroll Lock and Insert keys. This utility is especially useful for those who do not have a keyboard or laptop with led indicators.

But before you can use it make sure you have .netframework 2 installed. Download it from the link given

Keyboard Indicator