Problem regarding saving of jpeg file

I downloaded an update from Microsoft. Whenever I save a jpeg or anything else, the title to what I saved is not visible in the "Save box". I would then save it again & it would say it already exist and would ask to overwrite it. When I leave the internet & look at it through windows, it's there. When I go back on the internet & save another jpeg/file to the exact location, nothing is there except what I saved before I downloaded the update. What to do?
