This article describes how to install the agent on a Windows device (we also have installation guides for macOS and Linux):

Step 1: Download the agent installer

Head to the Nessus agent download page:
https://www.tenable.com/downloads/nessus-agents#nessus-agents-7-4-1

Search for NessusAgent-7.4.1-x64.msi and download it keep a note where you've saved it. (If you're running an older version of Windows, download NessusAgent-7.4.1-Win32.msi)

Step 2: Install, configure and link the agent

To configure each device for scanning you'll need the following three pieces of information:

  1. Full Path to Installer:
    This is where you saved the installer. For example, "C:\Users\[your name]\downloads\NessusAgent-7.4.1-x64.msi"
  2. Unique Key:
    A unique identifier that makes sure your device shows up in the right place - we'll provide this to you.
  3. Device Name:
    To identify your devices as targets for vulnerability scanning in our portal, you'll need to name them according to a specific convention. We provide you with a unique client prefix, which needs to prepend what you want to call your device. So if your device is called paul-laptop and your unique client prefix is DQEGBQUAAAc, the device name should be DQEGBQUAAAc_paul-laptop.

Once you have the above information ready, open a Command Prompt (cmd.exe) as Administrator and run the following command - modifying the placeholders (everything inside [ ] brackets) accordingly:

msiexec /i [1.Full Path to Installer] NESSUS_SERVER="cloud.tenable.com:443" NESSUS_KEY=[2.Unique Key] NESSUS_NAME=[3.Device Name] /qn


If you're on Windows 7 x64 Enterprise, Windows 8 Enterprise, and Windows Server 2012, please now reboot your machine.

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