Dear Binu, First of all ensure that your Windows operating system is pirated one or not. Pirated copies of commercial softwares are not secure. Good anti virus software are costly to buy. Using Linux operating system is a good solution to prevent virus attack. If you are new to Linux OS, choose a user friendly Ubuntu Linux. Latest version of Ubuntu Linux is freely available with last months Linux For You and Digit Magazine. All the best, -- Vimal Kumar V. Asst. Librarian Asian School of Business Technopark, Trivandrum-695 581 Web: http://www.vimalkumar.co.nr Blog: http://vimalkumar.oksociety.in OK Society Volunteer. http://oksociety.in --------------------------------------------------------------------------- "I forget what I was taught. I only remember what I have learnt" -Patrick White -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.