I was having trouble opening Word docs so tried repair and other things. Nothing seemed to work until I read a thread that said to file the irregularities down that are created with use on the two posts. When I removed the magnetic top of the wireless mouse and saw these two posts, left click and right click, I noticed that time had caused them to have little dents etc.. Once, lightly filed with a fingernail file, the Word docs etc. all opened fine. I am posting this so those who have a problem like I did will have a probable solution. Obviously, be careful with what you are filing and if it is the thing to do. I confirmed the need by visual inspection.