Method #1

From elevated ‘Command Prompt‘ window, type:

start appwiz.cpl

The usual “Programs & Features” will popup and:

• click on “Turn Window features on or off“
• look for “Internet Explorer” and check/uncheck it
• click ‘ok‘ button
• follow the instructions & reboot

Method #2

From elevated ‘Command Prompt‘ window, type the following:

• to remove it:

dism /online /disable-feature /FeatureName:Internet-Explorer-Optional-amd64

• to add it:

dism /online /enable-feature /FeatureName:Internet-Explorer-Optional-amd64

• follow the instructions & reboot
• add manually the Start Menu shortcuts to IE11.