Enter the word "command" in the search bar, instead or pressing enter press "Ctrl - Shift - Enter", this brings up UAC and asks for an admin password.
I used this in my other post:
http://asdirkseesit.blogspot.co.uk/2013/06/how-to-view-group-policy-preferences-on.html
(see addendum section)
Mentioned here
http://www.howtogeek.com/howto/windows-vista/run-a-command-as-administrator-from-the-windows-vista-run-box/
