There are many times when we leave the computer on for some downloads or processes such as antivirus scanning till they are completed, which is a power consuming and may harm our pc or laptop we do not know when to end, so to help you with this I suggest to use Blitz Planner.
As per the Blitz Planner,
Blitz Planner is a small, stable and fast time scheduling application for 32 and 64bit Windows operating systems. You can select one of 8 total possible actions, which will be triggered either after a specified time unit (second, minute, or hour) has past, or at exactly specified time. Also, you have the option to repeat the task until halted manually. The program supports both 24-hour and 12-hour time notations and can be minimalized to the Tray Bar, occuping no space in the system’s taskbar. No installation is necessary.
Supported actions: shutdown, reboot, log off, music/sound playing, specified message displaying, application execution and built-in sound alarm (the “Honk” option).
Not more to say about Blitz Planner its easy and very useful task scheduler application for windows for everyone.
Link: Blitz Planner