Disabling Run or Find from the Start Menu

Follow the below steps:

1.Start Regedit

2.Go to HKey_Current_User \ Software\ Microsoft \Windows \ Current Version \ Policies \ Explorer

3.Right click on the right panel and add a New / DWORD

4.Name it NoFile or NoRun

5.Give it a value of 1

6.Logoff or Reboot the computer