...On weekends (Friday to Sunday), the allowed time can be extended by e.g. one hour.
The program stores daily usage state in state.txt, so if the previous session ended with “time up,” the next startup triggers shutdown after one minute.
To auto-start, place a shortcut of the .exe file in the Windows Startup folder:
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup
Can be installed as a Windows background service using e.g. NSSM(open source) for reliable auto-startup and protection from termination, ensuring consistent parental time control for all users, but w/o warning.