You can find your computer's name on a Windows PC by opening the "About" menu, and on a Mac with the "Sharing" menu.
Open Command Prompt or PowerShell and enter "wmic bios get serialnumber" to find your PC's serial number. Windows and System ...
If you don't like the default name your PC has, you can always learn how to change it. Changing your PC's name lets you call it whatever you like while getting rid of that non-descript ...