If your Wacom tablet came with Corel Painter Essentials 5, follow these steps to claim your copy:
Ensure you have the latest Wacom Drivers installed. For Windows users, if pressure isn't working, check Edit > Preferences > Tablet and ensure "Wacom-compatible device (Wintab)" is enabled. Troubleshooting Common Issues Painter Essentials 5 Has a New Version
To download Corel Painter Essentials 5 as a Wacom bundle, you must register your device on the Wacom Website and retrieve the installer and serial key from the section of your Wacom account.