Windows XP could best secure with a new suite of software Secure Auditor. Single IP which is capable of performing auditing, event log management, windows password auditing, port scanning, windows inventory and asset management, ftp brutforce attack, http bruteforce attack etc. Other modules of this tool are also capable of performing audit on Oracle, MSSQL and Cisco routers with around 30 embedded tools. You know what is the best thing about Secure Auditor is? It provides complete specification and solution of identified vulnerabilities. Just check it out!