Support for Portable avast! is available from the publisher site.
Short description: avast! Antivirus U3 Edition is designed to protect U3 smart drives from viruses and other forms of malware. The U3 platform is all about carrying your entire workspace with you, including your programs and data....
To speed up your downloads we recommend you use a download manager such as 
Spam Container takes an entirely different approach to spam, allowing you to see only the email you have allowed, banning known bad senders so they are never allowed through and putting all unknown senders into a holding area
Monitor processes, services, connections, CPU, disk, memory. Remove spyware. Speed up boot time and performance. Complement antivirus software. Descriptions for 70 000 startup programs and services, alerts on new startups. Security analysis
Free Spyware Terminator provides effective real-time detection and removal of spyware and incoming threats on your computer. Reliable and user friendly, it's for personal and commercial use. Uses minimal PC resources and performs ultra fast scans.