I have tried many solutions as I read from this forum to fix this problem, such as restarting the PC, try to re install the driver, go to devices manager and delete the Arduino Uno Com11 and add it again, but still the problem is not solved. smiley-sad-blue smiley-cry smiley-cry
Please I need your help as soon as possible because currently I'm working on an important project. smiley smiley
If you have tried all these suggestions already but they didnt work then have you tried to do something with the ATmega8u2 or 16u2? I mean reading the fuses etc or trying to connect a ISP to it?