Step 3
Run Nmap
In Windows, run CMD command, then go to the Nmap folder (default is C:\Program Files (x86)\Nmap)
Then run nmap command to see if running
Obtain your computer ip with "ipconfig" command in Windows or "ifconfig" in Linux or Mac.
Scan your subnet with "nmap -vv -sn 192.186.1.0/16" assuming you are in a local private network 192.168.1.x