Hello,
Steps to install SNAC
1. Insert the Symantec Network Access Control CD or open the downloaded CD folder
2. Click the setup.exe file and this will open the Installation Panel
3. In the installation panel, click Install Symantec Network Access Control.
4. Click Install Symantec Endpoint Protection Manager.
5. On the Management Server Upgrade dialog, click Next.
6. Click Continue.
7. When the Server Upgrade Status log shows Upgrade Succeeded, click Next.
8. Click Finish.
9. Log on to the Symantec Endpoint Protection Manager console.
10. On the Policies tab, click Host Integrity.
11. In the right pane, click Host Integrity Policy.
12. Under Tasks, click Assign the Policy.
13. In the Assign Host Integrity Policy window, check the group to which you want to assign the policy.
14. Click Assign, and then click Yes to confirm the change.
Check these Articles:
How to Install Symantec Network Access Control
https://www-secure.symantec.com/connect/downloads/how-install-symantec-network-access-control
Symantec Network Access Control Whitepapers
https://www-secure.symantec.com/connect/downloads/symantec-network-access-control-whitepapers
Integrating Symantec Network Access Control (SNAC) with Symantec Endpoint Protection Manager (SEPM)
http://www.symantec.com/docs/HOWTO31159
How to Install Symantec Network Access Control when SEPM is already installed and Running
https://www-secure.symantec.com/connect/articles/how-install-symantec-network-access-control-when-sepm-already-installed-and-running
Hope that helps!!