: Office 2010 reached its end of support on October 13, 2020. This means Microsoft no longer provides security updates or technical support for this version.
If you bought a retail copy, the key is likely in the confirmation email or on the sticker inside the DVD case. For Volume Licensing (common for "Professional Plus"), the IT administrator in your organization will have the license documentation. : Office 2010 reached its end of support on October 13, 2020
: Search your inbox for "Microsoft" or the name of the store where you purchased it. Check spam or junk folders if it’s not in your main inbox. For Volume Licensing (common for "Professional Plus"), the
: If Office is currently installed and activated on your PC, you can use built-in tools or reputable third-party utilities to extract the key from the registry: Command Prompt : If Office is currently installed and activated