Enable Run option from the Start Menu

Manual Solution

Open My Computer –> C drive –> Windows –> System32 –> Locate gpedit.msc file and run it. See the figure below

While you have opened Group Policy see in the left pane and in the User Configuration Expand Administrative Templates and select Start Menu and Taskbar now in the right pane locate Remove Run Menu from Start Menu and double click it.

Select Disabled in the properties dialogue and press apply then OK

Now close all open Windows you will see the Run has been restored in Start Menu.