To un-zip downloaded files you need to run software that will decompress it. You can download free software called 7-Zip (for PC/windows) or ZipIt (for Mac). For 7-Zip, you will download from a site called SourceForge. Click and then Save the file to your computer; Run (execute) the file to install it for the Microsoft Windows operating system.

• 7-Zip (PC Windows)
  
• ZipIt (Mac)
  

You can also purchase software such as PowerArchiver, WinZip, or StuffIt to do the job.

• PowerArchiver
• WinZip
• StuffIt