To activate your Reimage software using a reimage license key, follow these steps:

1. Open the Reimage software on your computer.
2. Click on the "Register" button on the main screen.
3. Enter your license key in the field provided. The license key is a series of letters and numbers that you received when you purchased the software.
4. Click on the "Activate" button.
5. Wait for the activation process to complete. This may take a few moments.
6. Once the activation is complete, you will receive a confirmation message indicating that your Reimage software has been activated.

It's important to note that Reimage software requires an internet connection to activate. If you have any issues with activation, make sure you have a stable internet connection and that your license key is entered correctly. If you continue to experience problems, contact Reimage customer support for assistance.