Idle Computer Sleep is useful for a computer that is being used as a NAS, it allows the computer to force sleeping when there is no keyboard, mouse and below a network threshold.
If your Network card and Media Player (ie Kodi) is configured to WOL, this can save a lot of power and stops the NAS from staying on during long periods of inactivity like overnight.
** IMPORTANT: If you have any issues with this program please submit a support request at https://rewsteruk.freshdesk.com in the first instance, rather than request support in a review or review with low stars. I am very happy to help resolve problems or usability issues **
Windows does have this function built in, BUT this has been going wrong a few times after updates and the computer has not slept. This has recently been because of issues with windows update (USO Core Worker Process).
This program monitors key presses and mouse movements and also checks that the upload speed is above a threshold (which would indicate streaming). If none of the activities happen in a 10 minute window the program issues a sleep command to Windows.