Transaction Guard is a free software by TrendMicro that protects you against malicious spyware, malware & keyloggers while performing sensitive online tasks & transactions such as paying through credit card, logging into bank account, etc. through the web browser.

Transaction Guard has two components:

Spyware Monitor – Monitors for spyware and notifies you of any intrusions.
Secret Keyboard – Provides an on-screen keyboard for entering usernames and passwords.

Once you have installed Transaction Guard, a new icon will appear in your system tray. You can click this system tray icon to display the Transaction Guard menu to enable or disable the Spyware Monitor feature and to display the on-screen Secret Keyboard in a password clipboard window to securely enter sign in ID and password.

If you perform online transactions at a public computer such as an Internet cafe, this software is a must have as you never know if a keylogger is running in the background.

Transaction Guard works with Internet Explorer & Firefox on Windows Vista or XP.