Some of the software on ComputerPranks.com is in a compressed format as to allow for quicker download times. You need to decompress this software in order to use it. The compression software used is the Internet standard, called ZIP. If you would like to view this software, you will need to download a product called WinZip. Once you have installed WinZip, you can either re-download or open the file within this product. Then you can extract (decompress) the file to your machine and use it.