You must have faced this, maybe every now and then, when you hold down the "Ctrl" key to copy a list of files within a folder and without doing anything further, you notice to your dismay that the system creates a duplicate copy of every file and pastes it in the same folder. It certainly is frustrating because not only you need to start all over again but also delete all those extra duplicate copies. Well, not anymore. Here is small tip on how to go about it. Start by clicking the topmost file. Next, hold down the "Ctrl" key and "down arrow" across the list you wish to copy. You will notice a faint selection rectangle that moves down as you press the down arrow. When it reaches another file you want to copy, press the "space bar". In case you select the wrong file by mistake, all you need to do is to press the space bar again and it gets deselected. Once your selection is complete, press C without releasing the Ctrl key to copy the files to the clipboard and then navigate to the destination folder and press Ctrl+V to paste in copies of those files. No more hassles of duplication!