Many times we are typing somewhere on the computer or talking on the MSN, and we realize that there is keys that do not work, and we can't know what the problem why that happens.
Here are some steps to take into account:
Sometimes that is due to accumulation of dirt on the keysTherefore, first of all, you must know which keys are not working, then open the keyboard and clean with cotton and alcohol.
If the problem is not solved this way, the keyboard can be fixed by setting it to Windows Live Messenger, the two keys to watch out for are (ALT + SHIFT) or (Control + SHIFT). You must also take into account the language you are in, you must check that the language is Spanish, going to settings.