For new installed systems can this collection query be used:

select SMS_R_SYSTEM.ResourceID,SMS_R_SYSTEM.ResourceType,SMS_R_SYSTEM.Name,SMS_R_SYSTEM.SMSUniqueIdentifier,SMS_R_SYSTEM.ResourceDomainORWorkgroup,SMS_R_SYSTEM.Client from SMS_R_System inner join SMS_G_System_OPERATING_SYSTEM on SMS_G_System_OPERATING_SYSTEM.ResourceId = SMS_R_System.ResourceId   WHERE dateDiff(dd, SMS_G_System_OPERATING_SYSTEM.InstallDate, GetDate()) < 1 and DATEDIFF(HH, SMS_R_System.SMSUUIDChangeDate, GETDATE()) <= 24