Cannot ping ESP8266's IP address from a computer on the same network
First, you need to confirm that your PC's wireless connection is on the same IP subnet as the ESP8266. At the CMD prompt, type:

ipconfig /a


and look for the wireless adapter. Hopefully the IP address will start with 192.168.1.... It should but there's no harm in checking!

Second, check that your WiFi router hasn't disabled pinging between its clients - some do (mine did, until I threw it out...). Do you have a smartphone or other WiFi device? If so, find out its IP address (hopefully also 192.168.1....) and confirm that you can ping it.

Pinging your own address isn't very useful. Normally it detects the fact that it's its own address, and replies with no attempt at sending over the air.