Q: After installing Photoshop, my display goes black or gray, or the color looks wrong and it displays odd white colours. Why?
A: Your display color profile is not in order. First try re-calibrating through Adobe Gamma, and choose a different profile (such as sRGB) as your starting point. (don’t forget to save the new profile as the last step!)
Adobe Gamma can be found in Windows’ Control panel.
The problem may also be caused by video card incompatibilities. See Adobe CustomerFirst document
http://www.adobe.com/support/techdocs/c832.htm for more information.
Other useful links are