Even if all is in order on PMImport Page; it may be failing Revise Software Updates Task:
View 'Currently Running Tasks' report found in KM: HOWTO54534 or KM: HOWTO52986 to see if it is hanging on Revised or Downloading Updates
If running tasks are hung for PMImport or Revise Software Updates; review steps outlined on KM: TECH144662 to truncate bloated Task Tables and KM: TECH209754 to clean up orphaned tasks
Ensure the Vendor List holds the desired Software to be reported on and the version of the Software is not excluded:
If the Client is vulnerable to an update from a vendor via the Software Scan, yet that Software/Version is disabled on the PMImport > Vendor List; the Client will not scan for Compliance/Vulnerability for that Software as it doesn't exist in the Windows System Assessment Scan logic replicated from the SMP's Catalog Data.
Step 5. Clear the Server-side data hash for Patch Dataclasses: HOWTO60749
Step 6. Configure Client to trap Notification Server Event (NSE) files: HOWTO4191
These files can be later viewed with Notepad following a Patch Inventory Scan
Copy / Paste these files onto the Management Server into the default location: C:\Program Files\Altiris\Notification Server\NSCap\EvtQFast folder.
Watch the logs to see if these files are failing to process with errors
Note: Right-click / Open with > Notepad - ensure the file type is not associated with the Notepad.
The NSE should display the update name and data confirming the update IsInstalled / IsAppplicable.
If there is a problem generating the NSE's for Patch Management or sending them to the Management Server; lies outside Patch Management Solution, and could be a corrupt Altiris Agent, in which an uninstall / reinstall of the Altiris Agent may be in order to resolve this issue.
Step 7. Force a scan of the Patch Management Inventories: HOWTO58971