Turn off Fn key - weird behavior of keyboard

You might be astonished by typing keys in the keyboards. You are typing "u" and it becomes "4", typing "i" becomes "5". Same is true for keys o,l,;,k,j,m,7,9,0,/,p. Pressing one key becomes another one. But if you hold down Fn key and type these keys then it appears correctly. If you look carefully at the keyboard you'll see that several keys include blue lettering themselves. In fact, if you look at the keys 7, 8, 9, 0 on the top row, U, I, O, P on the next, J, K, L, : on the next and M, > and ? on the bottom, you'll see that each has a blue character on it. These blue characters work whenever you press the key while hold down the Fn key.

Note that the Fn key (also known as the Function key) is a feature found on most laptop computers. The Fn key allows several other keys on a laptop's keyboard to serve more than one function. Within limited space it increases the functionality of typing more keys. Dell, Asus laptops make good use of the Fn key. So, if you have the keyboards with Fn key you should be familiar about how to use them.

Now the point is without holding your Fn keys you are getting keys as if you are pressing Fn key. And so you are searching remedy of this problem. Based on your keyboard you can get original settings of your keyboard in following ways.

1)Try Fn+F11 key combination.
2)Shift + Num Lock.
3)Fn+ Num Lock.
4)Fn+F11+Scroll lock
5)Fn + F8 (on HP laptop)

Now you might wonder where you will get Num Lock or Scroll Lock key. This is simple really. You can easily try the key combination by your On-Screen Keyboard. You can find it through
Start -> Programs -> Accessories -> Accessibility
Enjoy!