You mention that "reds are a little weak". This outcome is being created by using the "perceptual" intent when you convert to the color space of the paper. The Paper normally has a much smaller color space capability than your source editing profile. When you convert using perceptual that will move most colors 'proportionally' into the smaller color space, reducing saturation on colors, especially those that are out of or on the edge of the gamut.
A good practice would be to soft proof your image while it is in your working space using the paper profile as the target. There you can compare the effect of using perceptual vs colormetric and see which you like better. The occasional downside fo colormetric converstions is that it 'clips' out of gamut colors to the edge of the color space of the paper, but the benefit is it does minimal change if any to the colors which fit in the space of your paper.
Nothing to do with windows 7, your issues all appear to be from approaches to color space conversion.
thanks, John