Hopefully someone has an idea for this issue with my 96 850. The driver window wont go down but rolls up. all other windows are fine. I appreciate any help/ideas. Thanks !

 

You may want to try spray some electronics cleaner like this .
and spay between switch and bezel to clean whatever gunk that has built up over the years ie. liquid spills and dry out with some "Canned Air" . Hold a rag or paper towel over the switch to keep from getting any "Blow-back" in your face.