WinCaffeine is a small application that sits in your taskbar tray, which allows you to “caffeinate” your computer, meaning as long as WinCaffeine is active, your computer won't turn on a screensaver or suspend itself. This may be practical during downloads or installations.
You need Visual Studio 2010 or newer (2019 is recommended) and .NET 4.0 SDK on your machine to compile WinCaffeine.