Recently we upgraded all of our computers at our facility. (OS=Win7 Pro 64Bit, Office 2010 Pro.) ALL of the computers have the same issue that I am about to describe.
Pictures are inserted into ANY MS program. During print preview, all of the images are in color. Once printed, randomly, SOME of the images are printed in black and white while others are printed in color. The only resolution we have found is to edit each image that printed in black and white and increase the brightness to 52% (edited while embedded inside the document, not the image file itself).
Steps taken have been to install different types of drivers for the printers, printed to all the different printers (local and network), and changing options for printing. None of these have worked.
The current resolution is very time consuming and a waste of toner which is an unacceptable solution IMO.