Hi,
Agent:
Drive Latter:\Program Files\Altiris\Altiris Agent\Logs (WinXP)
Drive Latter:\Users\Public\Documents\Altiris\Altiris Agent\Logs (Win7)
Drive Latter:\Program Files\Altiris\Inventory
Notification Server:
C:\Windows\System32\Altiris Logs
C:\ProgramData\Symantec\SMP\Replication\Temp
C:\ProgramData\Symantec\SMP\EventQueue