Windows comes with VBScript, all you have to do is make a text file with the .vbs extension and double click it. It contains some very basic functions for input and output (query boxes and message boxes). ~15 years ago i wrote an intro to programming article in a magazine that used that, it is something that has been on Windows PCs since Windows 98.

Nowadays there is also Powershell which can use the entirety of .NET and of course one can make an .html file and open it in a browser in pretty much any OS.