Final answer:
To recover a deleted file or folder on a Windows operating system, open the Recycle Bin and select 'Restore' for the file you want to recover. The Recycle Bin is a temporary storage for deleted files.
Step-by-step explanation:
To restore a file or folder deleted from your computer's hard drive, open the Recycle Bin and restore the file. On Windows operating systems, when files or folders are deleted, they are not permanently erased from the hard drive immediately. Instead, they are moved to the Recycle Bin, where they can be restored until the bin is emptied. This is a temporary storage area where deleted files are kept, giving you the opportunity to recover files in case they were deleted by accident. To recover a file, you would typically open the Recycle Bin, locate the file or folder, right-click on it, and select 'Restore' to move it back to its original location.