I am new at using the Arduino Micro R3 and have problems programming / uploading a sketch or using a sketch with serial communications. I read many postings but none solved my problem. (using Windows 7 64 - Arduino application 1.0.5)
The problem is that the serial port in windows "Device Manager" appears only for a few seconds after reset and then disappears. Device manager shows: Other devices > Arduino Micro The Hardware ID is: USB\VID_2341&PID_8037&REV_0100 USB\VID_2341&PID_8037
I can load a sketch by pressing reset on the board at the moment upload occurs. I used this step to upload the blink sketch with board type “Arduino Micro” set to ensure the Arduino Micro uses the correct device.
Also tried to update driver on the windows Device Manager > Other devices > Arduino Micro, and browse to C:\Program Files (x86)\Arduino\drivers Select "Next" The windows shows: "Windows was unable to install your Arduino Micro" "Windows could not find driver software for your device"
The arduino.inf (Arduino version 1.0.5 combined drivers) shows [DeviceList.NTamd64] %micro.bootloader.name%=DriverInstall, USB\VID_2341&PID_0037 %micro.sketch.name%=DriverInstall, USB\VID_2341&PID_8037&MI_00
Not sure what I am missing to have the serial always present after reboot in device manager.