There are a couple of ways. One of them is to take a tutorial, and one of them is to practice. There are typing games for kids that they sell, and they are fun, and help you learn at the same time....
Check to see if it is plugged in, if it is restart your PC.
Because without friction, it would not be successful when typing!
well Its ether its broken our if its on your laptop then you have a virus!
It might be caused by having the Num Lock on. Check to make sure it's off and try again.