line but if there is too much unorganised space in the memory you might experience the pc becoming slow hence there is microsofts own disk defragmenter tool for windows users there are other third party tools also available which will do the defragging if your system or drive component is showing signs of sluggishness defragging it might fix it if there are plenty of mismanaged fragments sitting inside the drive it may take a bit of time for the process to get complete just dont start defragging your hard drive every now and then once in a while should be good enough