They solution for me was to disable indexing. I had the impression this may have been unique to my system and not a common win7 64 bit issue. It took adobe a few days to figure it out. I have similar set up on win7 64bit laptop and no issues with bridge. It mught be reasonable for others to try this and see if it works. One would think that if this issue was common, then Adobe would have discoverd this by now.