Dear Sajha Computer Experts, I need help from you guys. I'm posting here a picture which says "USB Device Not Recognized" on the right bottom of my screen. What is the main problem? Last time I had same problem. I installed new win just now. Last time also, when I installed the WIN, the message appeared same as this and the next day my WIN was gone. I turned on my computer and I got 'NLTDR is missing'. I don't want same problem again. So would you please help me out...PLEASE!! -daum