His machine is Windows Vista Home Premium if that matters.
THe image is big. It is intended to print at 78 inches in size on one side.
Photoshop shows the image size as 1.5 gigabytes. Flattened and compressed to a jpeg it comes down to 500mB.
After saving the image will not display on Windows Picture viewer, the error message is file format not supported.
If you reduce the pixel size down to 72dpi, and save again the file size is 1.5mB.
Is the problem caused simply by the massive file sizes? If so is there any way around this?