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Keyboard issue with volume and lighting keys

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jeffrey694 -  
Good evening everyone, since this morning I can't increase or decrease the volume of my laptop and also the key for the lighting of my screen.. when I press F7 a message tells me: do you want to enable keyboard navigation? ....I don't understand
if someone can help me please I thank you (under Windows 8.1) brand compaq

3 answers

  1.  jeffrey694 Author
    It's all good, you just need to press F4, then (computer screen only) and everything will fall into place...
    1
    1. jeffrey694 Author
      Hello, yes, but it doesn't change anything when I press it… strange.
      0
      1. net_papy
        Hello, don't you have an FN key that can change the function keys' property?
        1