what did the person using the windows command prompt do during round 1

The windows command prompt is a an interpreter found in Microsoft computers that executes lines of code or commands given by the user if they are valid.

As a result of this, there are different commands which can be given by the user administrator to the windows command prompt which enables them to:

List the hardware information in the computer
Show/Check Networking information
Scan for viruses or repair bad system files, etc

Please note that your question is incomplete, so I gave a general overview which should help you get the right answer.