# Purchasing Parallels Desktop

If you're using a trial version of Parallels Desktop, you can easily purchase the full version right from the application interface. To do so:

1. Click **Buy** in the **About Parallels Desktop** window or when you see the promo.
2. Choose one of the following:
   * **Upgrade:** Select this option to upgrade your current version of Parallels Desktop. Please keep in mind that you will need the activation key for your previous version. If the **Upgrade** option is selected by default, Parallels Desktop has already automatically detected the key for the previous version. If not, please make sure you have it.
   * **Buy Full Version:** Select this option to purchase Parallels Desktop if you have never used it before.
3. Follow the onscreen instructions. You may need to scroll down to see all the information.