How can I automatically register my desktop version of Statistica? 

See related articles: How to register for the full Statistica license file manually? and also How to register for a network license file automatically (concurrent, enterprise, or server-type install)

Automatic registration is registration that is completed during installation or after installation through Statistica. 

During Installation:

Entering the registration information is required during installation.  All fields are required to be filled out in order for registration to complete successfully and for the installation to complete successfully:

Automatic registration successful:

Note: If automatic registration fails, it can be tried again after installation. If it fails again, we can register the license manually.

After Installation: 

If manual registration is selected, or automatic registration fails during installation, automatic registration can be performed directly through Statistica after launch:

1. Launch Statistica and click the 'Register' button in the licensing dialog:

2. Click the 'Automatic' radio button then click the 'OK' button:

3. Select the StatSoftRegistration.txt file and click 'Open' or 'OK':

4. Registration completes and the license file is updated automatically (internet connection required):