To remove the Wireless UI from the Welcome screen, kindly follow these steps below. From the command prompt,
– Run gpedit.msc to open the Local Group Policy Editor.
– In the Local Group Policy Editor, under Computer Configuration,
– Expand Administrative Templates,
– Expand System, and
– Click on Logon.
– Double-tap or click Do not display network selection UI.
Sign-out and sign in again to have the policy applied or
– run Gpupdate /force to apply the policy.
That is all you need to do 🙂