aria2 is a command line download utility that comes with a wide variety of parameters. It can be run as a Windows Service using FireDaemon Pro, which allows you to have the application start automatically at boot prior to login, start multiple instances of the application and more. This HOWTO will show you how to set it up. You can also use Fusion to manage FireDaemon and other Windows services via a web browser.


aria2 Setup Under FireDaemon Pro

Download the latest aria2 files from the official website.


Extract the .zip file to the directory of your choice. For the purposes of this HOWTO, we have chosen C:\aria2, but you may use any directory you wish.


Download and install FireDaemon Pro into the directory of your choice, typically C:\Program Files\FireDaemon.


Next start the FireDaemon GUI from the desktop shortcut. Click on the "Create a new service definition" button in the toolbar (or type Ctrl+N) and enter the information into the fields as you see below. Adjust the paths to suit your installation. For the purposes of this HOWTO, we will use the parameter to specify where to store the downloads.


  • Executable: The path to your aria2c.exe file. For the purposes of this HOWTO we have used C:\aria2\aria2c.exe.
  • Working Directory: The directory containing your aria2c.exe file. For this HOWTO, that directory is C:\aria2.
  • Parameters: The parameters you wish for aria2 to use. You may modify these parameters to suit your needs. View aria2's extensive list of parameters here.


Now click on the Settings tab. If you DON'T want to see aria2 running, uncheck the Interact with Desktop check box & select “Hidden” from the “Show Window” dropdown. You must run aria2 as the user you installed it as. In the Logon Account field type your username (e.g. Administrator) and then enter the user's password twice in the Password and Confirm fields. You can change the Process Priority to allocate more CPU time to aria2 or specify which CPU or core aria2 will run on (in the case of multi-processor, hyperthreaded or multi-core CPUs).



Now click on the Lifecycle tab. Be sure that "Console Application" is checked.



Now click OK to finish setup and start aria2!