What should I do if the NumLock key of the Win7 keypad is invalid?

        Everyone knows that the NumLock key on the computer keyboard is used to open and close the computer keyboard, but sometimes this button will be invalid, no matter how it is pressed or not, many people may think that the keyboard of the computer is broken, in fact, it is big. In most cases, there is a problem with the win7 system setup. We only need to make a simple adjustment to get back to normal...
1. First, we click on the "start" in the lower left corner of the computer, and then we can see The system runs the dialog box, as shown in the figure; or press and hold the shortcut key win+R, then you can also cut out the running dialog box
2, then we enter "OSK” in the input box, click OK to pop up System virtual keyboard, as shown below
3, we find the "options" in the lower right of the keyboard, then click
4, then another "options" dialog window will pop up, we noticed this time "Open the numeric keypad"The front is not checked.
5. At this time, click the item and then confirm the exit. At this time the lower right corner of the virtual keyboard NumLock key lights up, this time the general problem can be solved, of course, the keyboard hardware broken exception