Poor quality preview and save

I've put together my second slide show with music using MovieMaker. The
first worked fine - quality was fine also. I kept all the setting the same
for the second project, but when I preview or save as high quality, a
"yellowish" film seems to be covering each slide (pictures and titles). Any
clues for me as to what could be causing the difference? when i look at the
slides and titles in project mode, they are all as clear as can be. Thanks.

just use Windows Media Profile Editor to create a new profile, then copy it
to ...\program files\movie maker\shared\profiles\
now you can use mm to output as your customized video format.

my suggestion is to use mpeg4 format, so you can get better vidio quality.

cheers