What version of photoshop are you using?
That could mean that the Auto Color Correction Target Colors have changed from the defaults
Click on the color chips under Target Colors and Clipping to set the colors
Shadows RGB 0,0,0
Midtones RGB 128,128,128
Sounds like one of those Windows 8 glitches. Perhaps the OS has updated something, like the video card driver, and stuffed things up for you.
What operating system and version of Photoshop?
That was exactly the issue. Thank you very much. Windows 7 and CS6, thank you again.