my problem is that i can't upload anymore from my PC. As i tried to upload from the Laptop of my Sister it worked. When i start upload ,the compiling works, and then it is kind of frozen because nothing happens anymore (http://postimage.org/image/o5l73yhxr/). I tried install new usb and mainboard drivers,tried to install Arduino drivers again, but nothings worked. Also i 've read the troubleshooting for uploading problems, but they don't work either.
Before it began i tried to generate a tone to a speaker via Port 0 and since the RX led is on , i dont even know if this is normal i am pretty new to Arduino.
I use: Arduino Leonardo Win 7 Pro 64
So its up to you guys... what can i do/ try?