how to increase the speed of the wifi Internet connection

Remember that Microsoft reserved the 20% of the bandwidth of your connection to the router and the Internet. So I suggest to regain bandwidth.
gpedit.msc

go to Administrative Templates

then

Network

then

QoS Packet Schelduler

then

go to Limit reservable bandwith

then

change to  0

                                                                         
                                             uncheck  unnecessary boxes

                                           my settings   ip4 not ip6

                         microsoft automatic drivers update

                      update your virtual memory