Please make sure to run the software with administration rights. If the problem still occurs, please try the following steps:
- Shut down the software.
- Restart the application as an administrator (right mouse button on the software icon, then select "Run as administrator")
- Try the activation again with the usual procedure.
If you run the program as an app, right-click on the tile and select "Run as admin" from the context menu at the bottom of the screen.