AutoIt, is one of my favorite scripting tools for windows platforms. It is very powerful. It can be used for simple tasks, but also for complex tasks, as programs having a gui and using database.
It’s an easy to learn scripting language, as its syntax is basic like. But as I said before it’s really powerful, and there are lot of tools that make it easy to use by almost anyone with a basic understanding of programming. And of course there is a full documentation in .chm (help file).
Auto it scripts can be executed through the script editor or can be compiled to windows executables, which can be executed in any computer running windows without requiring to install any additional runtime. Exe files are usually too small which is ideal as they run fast and use a few resources.
If you want to test it here is the link: AutoIt. And the most important: it’s free!