Paint.NET uses a simple user interface that incorporates many different features including layering, special effects, and photo retouching. An automatic update option is available and they have an active online community available for help and resources.
Originally intended as a free replacement for Microsoft Paint, it has grown into a powerful yet simple photo editor tool. It has been compared to other digital photo editing software packages such as Adobe® Photoshop®, Corel® Paint Shop Pro®, Microsoft Photo Editor, and GIMP.
Minimum System Requirements
Windows XP SP2
800MHz processor (dual-core recommended)
512MB of RAM
1024 x 768 screen resolution
200+ MB hard drive space
Paint.NET also depends on Microsoft's .NET Framework 3.5 SP1, which is automatically installed if it isn't already on the system
Please note that Paint.NET uses your hard drive to store temporary files related to undo/redo history. Because of this, actual disk space requirements will depend on the actions you perform on an image, and on the size of the image.