How to use mouse setting and use Screen keyboard magic.Mouse Button setting. key board on screen,

Hi friends bina keyboard ke computer par kese kariya kare.? aaj ki video settings se sambandhit he .
Computer se sambandhit
or video dekhne ki liye link niche de gai he vaha se aap computer se samvandhit video par click kar dekh sakte he, Thanks.
(1) New computer ko connection https://www.youtube.com/watch?v=HGCi9jfVpFw&t=28s
(2)Recycle bin https://www.youtube.com/watch?v=CnUhm7-Vma0&t=240s
(3)sleep mode https://www.youtube.com/watch?v=p_hAaYYHeW0&t=37s
(4)my computer kya he https://www.youtube.com/watch?v=80gjDExdzuE&t=46s
(5)computer ko on off kese kare:- https://www.youtube.com/watch?v=5pkwVLdEO3E&t=56s
(6)Desktop kya he https://www.youtube.com/watch?v=2Pg1Ir8HS0A
(7) ) How To uninstall Software, https://www.youtube.com/watch?v=9HelhfZqPxo
(8) How to create folder. https://www.youtube.com/watch?v=8_h0iK8S-dA
(9)Screen Settings https://www.youtube.com/watch?v=tjILG544yys&t=73s
(10)Screen Sever settings https://www.youtube.com/watch?v=BC2Dv3MXvCw&t=97s

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. Thanks for taking your time to watch the video