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Malwarebytes' Anti-Malware is an anti-malware application that can thoroughly remove even the most advanced malware. It includes a number of features, including a built in protection monitor that blocks malicious processes before they even start.
 

Win Patrol

Win Patrol gives you an easy way to comb through existing background-loading programs. Its 'info' button provides basic details, including the company name, version, and startup location,enough to help you figure out which entries are removable. The free version is good, but I strongly urge you to spend a couple of dollars for the Pro (PLUS) version. Its comprehensive database gives you more details and specific recommendations for which programs to keep and which to remove. I promise you'll get that money back by eliminating your system tray headaches.
 

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Spam Aid 3.0

This is an easy-to-use Microsoft Outlook® add-on designed to provide an advanced protection against spam and unsolicited emails. The program uses Bayesian filtering technology that identifies about 98% of incoming spam messages. SpamAid seamlessly integrates into the Microsoft Outlook workspace, scanning and quarantining away junk emails. Caught spam is placed in a special 'Spam' folder under your inbox if you ever want to review it later.