This simple Windows program manages to create a balance between Photoshop and Paint, offering the complexity and the simpleness of both of them, in a very intuitive and friendly interface. Most users need an application which is a combination of these two programs. Using the Adobe Photoshop software, which is much more advanced than Paint, isn't such a good idea either, because this program requires a lot of time to be learnt and it also takes up a lot of system resources.
This Windows program hasn't been updated since the early versions of Windows and it lacks a lot of features and options. If you are a Windows user, you have probably used the Paint application at least once, either to edit an image or to save a screenshot.