“Office 2010 is no longer supported by Microsoft, which means it does not receive security updates... upgrading to a supported version such as Microsoft 365 or Office 2021 is recommended.” Landon Technologies
You can use basic versions of Word, Excel, and PowerPoint for free in a web browser via Office.com. Office 2010 free trial key
Even if you find a key, the activation servers may not always honor it for new installations, especially if the license was not previously registered to your hardware. Recommended Alternatives “Office 2010 is no longer supported by Microsoft,
Keys found on public forums are often volume license keys that have exceeded their activation limits or are illegal, "hacked" copies. Office 2010 free trial key
Community members and experts generally advise against trying to find old trial keys due to security and activation hurdles.