This is the post for Dayyan who is now facing this issue currently,hope he will slve using this Blog.    After installing Arduino IDE,Portable or normal version.if no device is detected,    Go to Control Panel-> Device manager   or   Goto Start menu and search for "devmgmt" click device manager           if you see USB2.0-Serial on the Other Devices/Unknown Devices,its because of Duplicate China Chip instead of original FTDI,Because windows now stopped support for it.     Solution:   You need to install CH340G driver     link for downloading driver     if download doesn't work try to download it from the webpage Link ,It will be in chinese just click the download this,Hahahaha       For more Details ->  Article Related to Serial port of Arduino     I have found this after 5 hours of Debugging      Feel free to Comment.....................     Learn Joyful.......