I have been using Dropbox for years. for the last year Dropbox disappears and fails to sync. The Icon in the taskbar disappears why is unknown to me. the sync stops and makes a mess of the workflow. Using Dropbox with AutoCAD, SketchUp, Rendering and other high end graphics software. this happens on a Windows 10 machine and on a Window 10 machine. it happens for no apparent reason, all of a sudden it is gone, usually when I need it most. I can understand one machine but two independent machines is a baffle. we have spent hours try to get Tech Support and my IT Consultant to figure it out. Absolutely no help. I uninstall and then reinstall and normally it will work for a few days and then all over again. I am at a loss and now looking for an alternative to Dropbox when I install new computers next month. I have 6 machines utilizing Dropbox and multiple remote consultants. Community input appreciated. MER