You may notice you cannot burn a disc with your non-administrator account in Windows 7 Windows 8 or Server 2008 or Server 2012.
You will still need the administrator password but while logged in as your normal account just simply do the following.
1. Copy your ISO to the C: drive. It will prompt for administrator credentials.
2. Do a search in start for CMD. Once it finds it in your start menu right click and say “run as administrator”.
3. Now anything you do in the command prompt will be ran with administrator privileges.
4. Run the command isoburn followed by the path to your image file. i.e. isoburn c:MyDisc.ISO