If you find a "portable" version online that includes the full suite (PowerPoint, Outlook, etc.) and is "pre-activated," it is likely a modified version created by third parties.
Support for Office 2010 ended on October 13, 2020 . This means Microsoft no longer provides security updates or bug fixes for any version of Office 2010. Using an unauthorized version compounds this problem, leaving your system vulnerable to exploits that have been patched in newer versions.
Unofficial "activated" versions are often bundled with malware, keyloggers, or trojans. Since the software isn't updated by Microsoft, it is vulnerable to security exploits.