Request admin permisions from batch

admin.bat

@echo off

:: Ensure we're admin by checking if the last arguent is "asadmin", and if not, restart as administrator with this argument set.
for %%a in (%*) do set last=%%a
if NOT "%last%" == "asadmin" (
    powershell start -WindowStyle Minimized -verb runas '%0' '%* asadmin'
    exit
)

:: Ensure the working directory is the same folder as where this script is located
cd /D "%~dp0"

:: Place the rest of the script here. This will be run with admin privileges.

Note that this will cause a UAC prompt to appear, which will prevent the script from running until accepted. To disable this notification, head over to User Account control Settings > Choose when to be notified about changes to your computer, and pull the slider down to Never notify.