Some versions of WinZip have problems extracting larger files. Make sure that you are using the latest version. Refer to the WinZip Website, www.winzip.com, for downloads. WinZip 9.0 or higher is required to create files 4GB or larger.

Compressed (zip) folder within Windows has a limit of 4GB, to extract larger files, we recommend using WinZip 9.0 or higher.

If this does not work, then download the file compression software WinRAR to extract the backup files.