Hi, My computer has not always done this but it has started to do this all the time now. I have a multicard reader installed on my desktop. I have a Nikon digital camer with a memory card in it. The card is not full. When i put the card into the multicard reader.........everything is fine. I am able to copy / delete pictures as i want. However, when i remove the memory from the multicard reader my computer shuts down......... How it shuts down. It closes all applications.......actually asking if i want to save anything. Its almost like someone told it to shut down.