I am new to working with raspberry pi zero. The first time I installed the raspbian image into the memory card for a headless setup I created a file named just ssh and then I was able to ssh into it using putty on port 22  , host name = [email protected]. Due to some software issue I did a fresh flashing of the raspbian OS into the memory card and just as first time I created a ssh file but I am not able to SSH into it.I get error "unable to open connection to raspberrypi.local Host does not exist". Also when I connect the Raspberrypi zero to windows should it be recognized as a USB ethernet device? I dont know if it was getting recognized the first time but this second time it doesnot.

I am new to working with the Raspberry Pi Zero. The first time I installed the Raspbian image into the memory card for a headless setup I created a file named just ssh and then I was able to ssh into it using putty on port 22, host name = [email protected]. 

Due to some software issue I did a fresh flashing of the Raspbian OS into the memory card and just as first time I created a ssh file but I am not able to SSH into it. I get error "unable to open connection to raspberrypi.local Host does not exist". 

Also when I connect the Raspberry Pi Zero to Windows should it be recognized as a USB Ethernet device? I don't know if it was getting recognized the first time but this second time it does not.