HI, i am a Windows XP user. I had done a fresh install couple of weeks ago and also installed AVG Antivirus on the same. Now from last few days, i can realize its strange behavior like system is working very slow, browsers are not working properly, etc.. So, i wanted to know is my Xp infected with any virus ? When i am scanning with my antivirus, it is not able to detect any worm. Please help.