The other answer requires that you enter the Administrator account password. Also, running under an account in the Administrator Group is not the same as run as administrator see: UAC on Wikipedia
Windows 7 Instructions
In order to run as an Administrator, create a shortcut for the batch file.
Then you can set the shortcut to run as administrator:
Now when you double click the shortcut it will prompt you for UAC confirmation and then Run as administrator (which as I said above is different than running under an account in the Administrator Group)
Check the screenshot below
Note: When you do so to Run As Administrator, the current directory (path) will not be same as the bat file. This can cause some problems in many cases that the bat file refer to relative files beside it. For example, in my Windows 7 the cur dir will be SYSTEM32 instead of bat file location! To workaround it, you should use
cd "%~dp0"
or better
pushd "%~dp0"
to ensure cur dir is at the same path where the bat file is.