Not everybody that uses the Windows operating system knows what the functions keys are for. According to statistics, only 10% of the users of the Windows platform know how to utilize the 12 keys right above the keyboard. That is an awful low for a number when you think about it.
The function keys to common people especially those that do not work office-based are not really aware of the 12 keys that are placed on top of the numerical keys on their keyboard. I, myself, have not even really utilized those keys until I worked for a company to do encoding jobs. So I personally understand why a lot of people are having similar situation than I am.
The uses of function keys