On a computer with internet access, go to the Nessus Offline Registration page .
The command-line interface provides more detailed error information. Run: nessus offline activation license already in use
Confirm the reset. This actions unlinks all previous challenge codes and hardware profiles from your license string. On a computer with internet access, go to
Select your product type (e.g., Nessus Professional or Expert). Step 2: Reset the Product Activation On a computer with internet access
Transfer the downloaded files to your offline machine and apply them using the command-line interface. On Windows Move both downloaded files to your Nessus directory. Register the license file: