User blog comment:Trellar/Screenshots: Tips & Tricks/@comment-4434187-20120330092504/@comment-770155-20120401114504

While paint might be an easy tool to start with. It is ill advised to use for serious purposes. Paint has terrible jpg quality/compression-levels. Opening an image in paint, and saving it right away without any edits will result in a notable loss in quality when you compare them again. Other comments on this blog have some good suggestions for better programs: Irfanview or Paint.NET might be nice programs to start with. The GIMP and Photoshop are perfect for the job, but are much more difficult to use.