There is no conventional Start Menu in Windows 8 like to that of in Windows 7, which shows  programs and files while typing in the the search box, if you want run command as administrator in Windows 8 ,here is how to do that.

cmd prompt opened with admin previlages thumb How to Run Cmd as Administrator in Windows 8

Most easiest method is Windows 8: Quickly Open Elevated Command Prompt with Win+X, A Shortcut

Running command Prompt with Admin Privileges in Windows 8

1. Press Win key +F for metro search UI to appear

2. Click on Apps and type cmd in the search box under Search for Apps  and press enter

apps results for cmd thumb How to Run Cmd as Administrator in Windows 8

3, cmd appears on the left pane, right-click on it click on Advanced at the bottom and select run as administrator

run as administrator thumb How to Run Cmd as Administrator in Windows 8

Command prompt window opens running with admin privileges appears as shown on top in the screenshot.

Update 06/01/2012: Even easier method, follow the instructions below

Open Windows Explorer or My Computer and Open C Drive

Now from File menu select Open Command Prompt>Open Command Prompt as Administrator

open commad as admin from Explorer file menu 300x179 How to Run Cmd as Administrator in Windows 8