Third-party software is required to open .zip files in earlier versions of Windows. Many free programs are available online.
7-Zip is free, easy to use, virus-free and contains no adware. Instructions:
1) Download the 7-Zip exe file to your computer. Double-click the program icon and choose "Run."
2) Choose a location on your hard drive and choose "install."
3) Once complete, open 7-Zip. Navigate to the .zip file you wish to open and double-click.
4) Drag contents to your desktop or other location.