Only mark a program to run as admin if it is necessary for the program to have that level of permission. In order for a program to run as admin, it needs to get admin. permission. This is to prevent programs running elevated without your knowledge. You can turn UAC down, but that also reduces security. I have mine set at the default. After everything is installed and set up, I don't get the prompt much unless I'm playing around. I'd rather click the button than have to deal with a complete reinstall.
Might take a look at this. Elevated Program Shortcut without UAC Prompt - Create
Edit: beat me to the link