Fellas, i've tried everything. 2 different arduino uno boards, 2 different computers (Win7x64 and Win8x64), a dozen of goddamn usb cables, all kinds of drivers (including the ones by eried), USB 2.0 as well as 3.0 - this bitch still giving me "device cannot start error 10". Played around with com ports, baud rates and whatnot. Driver is getting installed and and device appears as Arduino Uno in device manager but it DOESNT WANNA START. My condition went beyond frustration - it's despair now. What should i do?? Is there a one 10000% working way??? Both boards seem to be working properly (green LED on and orange flashes sometimes). Should i get a different brand of board (mines both are OSEPP, Uno R3 Plus)? Should i run XP from a USB and try to work on it..? I need a definite answer please...