Fn keys problem or a feature.

Had got a new USB keyboard for my laptop (might sound weired), but I needed a separate numeric keypad hence had to get a new keyboard. After few days of plugging in the keyboard and using the num pad, the keyboard on my laptop started to behave weird.

If i press o i used to ket 6,if I pressed p i used to get *. Finally i realized that there was a virtual numeric keypad on my laptop keyboard. i. And the way to switch it on/off was to toggle Fn + NumLck or Fn + ScrLk..... never focussed on those keys till now :)

Well now my new USB keyboard looks obsolete.