Net Protector Antivirus 2011 is a very useful tool.
Main features:
- Vista compatible
- Complete Internet Protection and Security
- Realtime Protection Shield-- Zero-Virus Shield stops the viruses in realtime before they reach your PC.
- Worm Stopper-- Detects & Stops intrusion of new & unknown worms into your computer.
- Utilities for Operating System Problems-- Clean Temporary Files, Clean Registry, Fonts Folder, Missing Folder Options, Stop Auto Dial.
- Startup Scan-- Checks memory on Startup and dis-infects automatically.
best antivirus in the world