Step 1. Free download the Screen Recorder
Free download and install this video recording software on your computer. Then, run this software on your computer. In the home interface, select 'Video Recorder'.

Step 2. Recording area and audio settings
When you enter the Video Recorder interface, you should decide the recording area and audio recording.

You can record the full screen by clicking “Full”.

For recording the customized area, you just need to click “Custom” to select either “Fixed region” or “Select region/window”.

“Fixed region” will display the common recording area with the specific value, while “Select region/window” will give you more controls to select the specific window or rectangular area.

Note: For customizing the recording area, you should open the window that you want to capture. Then you can get the exact recording area.

As for audio settings, just toggle on the audio options from “System Sound” and “Microphone”.

For saving online movies, you should turn on “System Sound” and turn off “Microphone”.

For creating a video tutorial with your narration, you should turn on “Microphone”. As for “System Sound, it depends.

Step 3. Record and save the video recording

After all the settings are made well, just click the “REC” button to start recording. During the recording process, you can use the edit button to edit the screen while recording.

Then, click the “Save” button to export and save the video recording file on your computer.

Reading more: https://www.vidmore.com/record-video/how-to-record-on-windows-media-player/