suggestion for troubleshooting arduino

Hello Everyone. Brought my first arduino board(uno r3). I completely followed jeremy blum first tutorial as well getting started guide. When i plugged to usb, power led blinks fine. I mean it's not faint. But when i press upload button it got some verification error and sometimes "no sync" problem. I googled and found some suggestions at the adafruit site but it was not worth. So thought of re-posting again. I checked serial port, selected correct board etc..So don't get me to this answers again. Thanks!

OS?