Thank you for your help. The video card is an ATI 9800 and as I mentioned above this is a new problem, it worked fine on this computer, with this video card, and configuration. I also stated above "I can drag the Photoshop application to either monitor and the purple problem definitely stays with Photoshop"

Does anyone know if there are any problems or conflicts with Microsoft's color control applet for Windows XP?

Has anyone had problems with PIM (print image matching) plug-in for Photoshop?

Or does anyone know of any problems of not being able to remove these completely from the computer with add/remove function in Windows XP?

I also tried a system restore, but that did not solve the problem.

Can anyone think of any other software or settings that may interfere with Photoshop's color?

Thanks in advance for any help or ideas.

Randy