Purpose: According to Symantec:
ALTIRIS AND SYMANTEC ARE NOW ONE COMPANY. We are currently in the process of migrating content and functionality from the Altiris websites, and have created this page to assist you in navigating to Altiris-related product, support, and services information.

Altiris service-oriented management solutions provide a modular and future-proof approach to managing highly diverse and widely distributed IT infrastructures. They are open solutions that enable lifecycle integration of client, handheld, server, network and other IT assets with audit-ready security and automated operation.

This process hosts the system tray icon for those computers logged onto the NS via terminal services. In addition, you will see one instance of this process for each user logged on to the system.

There is a registry key setting that can keep AexAgentUIHost.exe from loading for each user:

HKLM\Software\Altiris\Altiris Agent\Run UI in main Session only.
Changing the value to 1 will keep the process from loading for every user

aexagentuihost.exe is required by third-party software or hardware and should not disabled.

Percentage of recently scanned PC's with this process running: 0.02%
Average CPU use for this program: 0%
Average RAM for this program: 5 MB