Answer and explanation:
When files in a computer are taking longer than usual to open up, it is a clear signal that you need to defragment the disk. When files are stored on the computer, they are saved in a specific part of the hard disk. As we delete files, those parts are left in blank creating empty spaces. The more we continue saving and erasing documents from our computer, the more blank spaces the hard disk will have implying that for opening archives allocated in different parts of the hard disk, it will have to spin more time until the file is found, making it perform slower. By defragmenting the disk we set together all the files saved in the computer, meaning the hard disk will have to spin fewer times to open the archives, which will speed up its performance.