7-Zip is a powerful open-source program capable of managing most of the compressed files such as zip, rar, 7-zip indeed, available in both 32bit and 64bit (depending on the type of processor installed) if you are sure, download the 32bit version.
You can also try the new beta versions, but the functioning is not perfect yet.
Official project page: 7-zip.org
For a guide on how to use the program visit fribby.net/7zip/?lang=en
Free Download 7 Zip in Italian for Windows 32bit or 64bit (x64):
File
License terms
GNU LGPL information
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.