Have you tried a portable version of Photoshop? Did it work or infect your PC? Share your experience in the comments below (but sanitize your links first).

If you are looking for the "portable" convenience of Photoshop, is the best solution. It is a free online editor that runs in your browser. It looks almost exactly like Photoshop and supports PSD files. You don’t need to install anything, and it is completely legal.

Lightweight, portable, and surprisingly powerful. With the right plugins (e.g., BoltBait pack), Paint.NET can handle layers, adjustments, and effects similar to basic Photoshop tasks.