While running a python program testing Serial communication with Arduino UNO, I found Arduino failed to seek COM port.
I checked Device Manager and it showed Arduino COM port with exclamation mark in a yellow triangle as the image 001.JPG.
I forcely changed COM port from originally COM5 to COM30 with the hope it might repair any damaged com port problem. But, it wasn’t effective.(see the image 002.JPG)
I tried to update driver in accordance with driver software update with driver’s inf files in Arduino folder. (see the image 003.JPG) But, during the update process, a warning window appeared as the image 004.JPG, which says “problems happened while updating”
Furthermore, I’d done the below tries and anything didn’t work.
I changed USB ports to connect the Arduino board to the others in my laptop but, it still had the same problem.
I removed the driver and reconnected Arduino uno but, it wasn’t effective.
I connected the Arduino UNO to another computer, it worked without any problem.
I connected a new Arduino UNO but, it had the same exclamation mark in a yellow triangle.
I deleted Arduino program in my laptop and downloaded the new version 1.6.11 here in Arduino.cc and installed it but it has the same problem.
I forcely pasted inf files in Arduino-drivers folder onto window-inf folder and reboot the laptop. It wasn’t effective.
To check if there is any troble in USB ports in the laptop, I connected my smart phone to the USB ports, it worked without any problems.
My laptop has i7 cpu and windows 10.
please advise me what I should do to make my laptop have a correct Arduino driver.