1-Defender is a free security utility for safe Internet browsing, email communication and instant messaging. 1-Defender designed to protect a Windows XP user from malicious Web sites and rouge e-mails targeting a user's computer with spyware, keyloggers, rootkits and other malware by allowing the user to run Internet Explorer, Microsoft Outlook and Windows Messenger in a SafeInternet mode. SafeInternet Mode protects user PC from malicious software by employing Least Privileged User Account (LUA) that does not reduce Windows usability and flexibility, and does not downgrade user's Internet experience while making Internet experience safer and much more secure.
Version 2 extends the functionality to support Microsoft Outlook, Outlook Express and Windows Messenger. In addition it offers some user interface improvements.