---
title: "Activate a license"
canonical: "https://help.vicon.com/space/Tracker310/13927219/Activate%20a%20license"
format: markdown
---
After you have received a license file from Vicon Support, you must activate it before you can start using Vicon Tracker.


    **To activate a license:**


1. Check your email for a message from Vicon Support. The license file (named *Vicon Tracker Release Number License Type.lic*, for example, *Vicon Tracker 3.10 Network.lic*) is attached to the email. If you're using a Safenet dongle, the **Subject** line of the email has the ID of your dongle (of the form UBnnnnnn)  
If you have not received a license file, request one as described in [Request a license](https://vicon-help.atlassian.net/wiki/spaces/Tracker310/pages/13930432).
2. Save the license file (*.**lic**) to the Windows desktop of the machine for which you have a license (or any other suitable location).
3. Start Vicon Tracker and in the **Vicon Product Licensing** dialog box, click **Activate License**.
4. Depending on whether you are using the file as it was received from Vicon Support or as a text string copied from the file:
  - In the** License File Activation** field, type or browse to the location of the license file (*.lic) and click **Activate from File**; or
  - Copy the text to the **License Activation string** field and click **Activate from String**.
5. Click **OK**.

> ✅ **Tip**   
> ✅ You can deactivate a network license from the relevant license server machine only, not from any of the client machines.

When you have activated your license, you are ready to start using Vicon Tracker.