Download Software Update Packages:There are some instances where this is a timing issue with package servers or other processes and can resolve itself (Note: product is not real-time):
Troubleshoot Agent to Site Server communications;
View Altiris Agent and SMP Logs, and view IIS Logs on SMP to ensure clients are able to obtain data
View Site Server Agent GUI and Logs; issue may be Site Server is out of sync as outlined in KM: HOWTO83906
This can be one of many policies missing; check the Agent's ClientPolicy.xml to ensure all Patch Policies are targeting
Ensure only one Default Software Update Plug-in Policy is targeting the client if the policy was cloned.
Ignoring update schedule: Updates cannot be applied whilst in this state; client needs reboot
Change the Windows System Assessment Scan to run 'Send Inventory Results Only If Changed'
Troubleshoot further as outlined on KM: HOWTO60750
2. To resolve the less common issues:
DNS: Resolve the DNS issue or change the Agent configuration to use IP Address instead of a name.
IIS: IIS issues like having multiple versions registered or Verbs not associated to the Virtual directory
IIS: In IIS, go to the Default Web Site > Altiris > InventoryRuleManagement > Agent > Properties > Directory Security Tab > Authentication and Access Control. Here, check the anonymous access check box.