My laptop's WiFi button is not working.
Is there any command in Windows to turn on WiFi ?
To do this using netsh:
Get the Interface Name:
netsh interface show interface
Enable the interface:
netsh interface set interface "Interface Name" enabled
To complete the solution to your problem, you could create a shortcut, and make it run on the startup of Windows. For example, if the name of your wireless adapter in netsh is Wi-Fi, the shortcut would look like this (one line):
C:\Windows\System32\runas.exe /savecred /user:administrator "C:\Windows\System32\netsh.exe interface set interface \"Wi-Fi\" enabled"
The runas command ensures that the command is ran as administrator, which is required to bring the interface up or down. The /savecred switch will save the credentials, which might be asked the first time, but usually not after that.