The Altiris Database can be automatically populated through multiple sources including Active Directory Import, Resource Discovery, Network Discovery, Deployment Solution Agent Configuration, and import/export rules.

If you deleted computers from reports or collections, but they reappear automatically sometime later, do the following:

• See if Resource Discovery is enabled. To access Resource Discovery, in the Altiris Console, click the Configuration tab > Server Settings > Discovery Methods. In the right pane, make sure that you only have the domains you want included in your Altiris Database included in the Domains to search window.  Are the unwanted computers in a domain listed in the Domains to search field? If so, what are the options being used? If the Domain Browse List box or the Domain Membership box is checked, the Altiris Database may be getting the unwanted computer information from those Microsoft Windows sources which may not be current.

To troubleshoot, uncheck the Enable Schedule box and click Apply.

• See if Active Directory Import rule for computers is enabled to update the computers from Active Directory. To access Active Directory Import, in the Altiris Console, click the Configuration tab > Server Settings > Notification Server Infrastructure > Active Directory Import. If the computer import rule is enabled, make sure that the computers you don't want in the Altiris Database are not listed in Active Directory. If they are in Active Directory and the Import computer rule is enabled, the computers will be imported on the schedule specified.

To troubleshoot, disable all the computer-related Active Directory import rules and click Apply.

• See if the Deployment Solution Agent Configuration (DSScrape) is enabled. In the Altiris Console, click the Configuration tab > Solution Settings > Deploy and Migrate > Deployment > Deployment Server Agent Configuration > Deployment Server Agent Configuration. If it is enabled, you may be getting the unwanted computer entries in the Altiris Database from a Deployment (eXpress) Database. If you have Deployment Server installed, check the Deployment (eXpress) Database to see if the unwanted computers are included there. If they are and if you have the Deployment Server Agent Configuration enabled, you could be getting the unwanted computers from the Deployment (eXpress) Database. If that is the case, you will need to remove the unwanted computers from the Deployment (eXpress) Database or disable the Altiris Deployment Server Agent Configuration. 

To troubleshoot, disable this and click Apply.

• See if Network Discovery is installed. From the Altiris Console, click the Configuration tab > Solution Settings > Network Discovery > Scan Groups > Default Scan Group.

To troubleshoot, go into the Schedule tab, uncheck the Enable Schedule box, and click Apply.

• See if any import/export rules are enabled that may be pulling information into the Altiris Database from another source (such as Connector Solution). In the Altiris Console, click the Configuration tab > Server Settings > Notification Server Infrastructure > Data Replication > Import/Export Rules.

To troubleshoot, disable any rules that may be enabled and click Apply.

After disabling these possible imported computers, remove the unwanted computers from the Altiris Database again and wait a day to see if they get reimported.

• If the unwanted computers don't get reimported into the Altiris Database, enable the Deployment Solution Agent Configuration and wait to see if the unwanted computers get imported. If they don't get reimported after a day, I'd enable the Resource Discovery policy and wait to see if the unwanted computers get imported. Continue enabling the items you disable and checking to see which brings in the unwanted computers one at a time until you find which is importing the information into the Altiris Database.
• If the unwanted computer do get reimported into the Altiris Database after disabling the above policies and schedules, you will need to send the a.log files for evaluation.

Note: The unwanted computers' information could be being acquired from multiple sources, so I would enable the possible sources for the information one at a time and wait a day to see if the computers are acquired again when you enable each source.