Microsoft stopped providing technical support, bug fixes, and security updates for Office 2010 in October 2020.
Official download links have been retired. If you do not already have the installation media (CD or backup file) and a original, purchased product key, you cannot officially install the software. Office 2010 free trial key
Keys found on public forums are often volume license keys that have exceeded their activation limits or are illegal, "hacked" copies. Microsoft stopped providing technical support