It is so far fetched that the OS could affect the color balance that
I'll dismiss it right now.

Even if nobody smokes the air is not clean in most of the "civilized"
world. As such you might need a cleaning of the window of the bar that
actually does the scanning. Since the beam passes through twice, any
darkening is doubled. Worse yet would be having to clean the multi
facet mirror, if it has one.

All surfaces except that of the light and the detector itself will
double their effect because the light passes through them twice, now
you got the top of the scanner glass as well as the bottom, and youv'e
got that window on the scanner bar which count for two passes of the
light each.Add the contamination of the light source and the pickkup,
even though not that bad is multiplied.

Your best way is probably to adjust the scanner's color temerature
settings. That way you need not take anything apart and really, some of
these things are a real PITA to put back together.

If those settings exist for your scanners, problem solved, if not for
machines running 95B I'd recommend PSP4 or Photoshop4. Photoshop 4 has
independant gamma type adjustments for each color in either the RGB or
CMY mode. Between these two programs to can do alot. Between the two
there is a very rich set of functions.

Best bet is settings on the scanner, if it will hold them all programs
are then again created equal.

JURB