You can add the switch /S to do a silent installation. Use the command prompt console or the Windows "Run" box to do the installation. Use /D (optional) to set the install directory.
Sample: C:\Temp\au.exe /S /D=C:\Program Files\Ace Utilities
where C:\Temp\au.exe is the path where you have downloaded/saved the Ace Utilities setup file and C:\Program Files\Ace Utilities is the folder where you want to install Ace Utilities.