Free photoshop for the grown-ups

Who needs Photoshop when you have Gimp!
Indefinitely more bang for the bucks than the expensive market leader.
Price comparison is a bit lame when it comes to free open source software, I admit.

Gimp is more than advanced (and user-friendly) enough for most users.
 Although it is kind of Linux-based, there have been windows installers for it for years, so it is stable, and does not need a lot of special configuration or a degree in computer science to install.

You get the windows version here:
http://www.gimp.org/windows/