Although some softwave can create the WIFI,But I don`t want to install too much softwave.So I find a way that you don`t need install anything.（it may not use in Desktop PC,if your PC don`t have WLAN card）.
Step 1: Open the Windows Cmd
- press the Win && R in your keyboard.
- you will see a windows like the pictrue.
input 'CMD' and press enter.
Step 2: You Will See a New Window Like This.
Step 3: Set Your Wifi Name && Wifi Key
in your cmd input
netsh wlan set hostednetwork mode=allow ssid=[param1] key=[param2]
param1:your wifi`s name
param2:your wifi`s key(should more than 8 character or number)
in the picture I set my ssid(my wifi name)=YourWifiName,and key(my wifi key)=YourWifiKey
Step 4: Open Wifi
we need input
netsh wlan start hostednetwork
Step 5: NOW!you Can Use the WIFI.
Step 6: Stop Your WIFI
netsh wlan stop hostednetwork
the WIFI is close.