There is a built in report in the console that will give you this information I believe.

Sorry to hear that. I've posted a very useful link below.

Altiris Knowledgebase
https://kb.altiris.com

This link is the knowledgebase. Specifically It's the Notification Server (which hosts the reporting system) that you will be interested in for reporting.

Have a look. If you get stuck on something specific ask here. There are plenty of friendly people that'll help.

Ray,
I'm currently working on generating Altiris reports from NS Console.

Once you are familiar with Altiris reports creation, try the following SQL query to fetch machine names and OS information.

SELECT  T0.[Name] AS [Machine Name],
               T0.[Domain] AS [Domain Name],
               T0.[OS Name] AS [OS Name],
               T0.[OS Revision] AS [OS Revision],
               T0.[OS Type] AS [OS Type],
               S1.[SiteCode] AS [OU]           
FROM    Inv_AeX_AC_Identification T0
JOIN       Inv_Mon_SM_Machine_Locale S1
ON         S1.[_ResourceGuid] = T0.[_ResourceGuid]             
WHERE  T0.[OS Name] NOT LIKE '%Vista%'
ORDER BY  T0.[Domain]    

The above query will give you the machine names without VISTA operating system on them.

I hope this helps. Letn me know if you need more information.

Thanks,
Eshwar
 

You can further scope your results by adding a collection picker: https://kb.altiris.com/article.asp?article=24744&p=1

You are right  Jim.
Whenever there is a need, I use "Collection picker" for computer collections. Otherwise i use dropdown list. 

Some time back i created an altiris report [we call it "Life Cycle Management Report"] which will sort out compliant and noncompliant machines.

We have a standard build environment with Windows 2K/2K3 SP2/XP SP2/SP3 OS and other standard softwares. My report will filter compliant and noncompliant machines accroding to the build standards. I used Drop Down lists for components [OS and Software] and compiance [Compliant Machines/Noncompliant machines].