: If you have the original DVD, you can run SETUP.EXE to install the 32-bit version (the default choice).

However, there are where you might get it without paying:

Because Microsoft no longer hosts the download links, you must rely on trusted software repositories. Always scan files for malware before installing.

Many websites claim to offer "free downloads" or "cracked" versions of Office 2010. These sites are the primary source for the search query.