Zip files are single files that contain one or more compressed files. People zip files to keep related groups of files together and to make files smaller so they are easier and faster to share by email or via the web. Zip files are also ideal for archiving since they save storage space.
To open zipped files, you need a program like WinZip that can extract the content for you.
How to unzip files with WinZip
Save the .ZIP file to the desktop. If your compressed file was downloaded from a website, it may be saved in the Downloads folder in your Documents or user directory.
Launch WinZip from your start menu or Desktop shortcut. Open the compressed file by clicking File > Open. If your system has the compressed file extension associated with WinZip program, just double-click on the file.
Select all the files and folders inside the compressed file. Or multi-select only the files or folders you want to open by holding the CTRL key and left-clicking on them.
Click 1-click Unzip and choose Unzip to PC or Cloud in the WinZip toolbar under the Unzip/Share tab.
Choose the destination folder to place the extracting files and click "Unzip" button.
Find your extracted files in the destination folder.