What does this mean??? Event Log Scan

From: Chance Orr <karismau(at)yahoo.com>
Date: Thu Jul 31 2003 - 00:41:15 EDT

('binary' encoding is not supported, stored as-is)

07/30/2003 23:49:02 612 Audit Policy Change Success audit Critical Security SYSTEM xxxxxxxxxx
07/30/2003 23:49:02 540 Successful Network Logon Success audit Critical Security ANONYMOUS LOGON xxxxxxxxxx
07/30/2003 23:49:24 680 Account Used for Logon Failure audit Critical Security SYSTEM xxxxxxxxxx
07/30/2003 23:49:24 529 LF: Bad user name/password Failure audit Critical Security SYSTEM xxxxxxxxxx
07/30/2003 23:49:33 680 Account Used for Logon Success audit Critical Security SYSTEM xxxxxxxxxx

This appears in my event log everytime I start my pc. I am using a firewall & XP-Home

thanx

---

---

Received on Thu Jul 31 13:22:38 2003