i have seen written in many online secrity generals tht use of antivirus software is must for online safety . i m having athlon xp2.01 ghz. processor with 256 mb ram . it gets quite slow when sing any antiviruses . so what i did is installed two windows xp on different partitions , get antivirus installed on one in least use and updated it , so tht i can scan my system from there offline. now on most used windows i installed ' microsoft antispyware ' in active mode and zonealarm pro firewall in tighter program controlled mode . am i really secure now ? tell me !