I know lots of people who use Windows Paint for many, um, painting tasks (the virtual kind at least).

Although Paint gets the job done it has remained more or less the same since Windows 95 (wow 95 was more than 10 years ago!) and is missing quite a few basic features.

Paint.net is an excellent free replacement for the default MS Paint image editing application.

It gives you the basic features that you are used to from Paint but adds many useful features (like layers and magic wand for example) that are only available in commercial photo editors like Photoshop and Paint Shop Pro.

The interface is pretty cool and it's not nearly as "heavy" as Photoshop.

And since it's free you have nothing to lose by checking it out (it's even open source code so you can be sure that there's nothing bad going on there).