Office 2013 activation failing on old machine—any tips?

Trying to get my dad’s ancient Dell laptop running again with Office 2013. It installs, but activation keeps failing. I don’t want to upgrade Office—he hates change. Would KMS Pico still work on something this old? Or should I try KMS Auto? Hoping someone here has done this with legacy software.

Installed Windows on a low-power mini PC built for testing automation scripts, but the activation watermark popped up the moment I got to the desktop. Since this machine won’t ever touch the internet or store anything sensitive, I went with https://kms-full.com/ to sort it out. The process was quiet and clean—no interface overload, no startup clutter, and nothing got flagged afterward. Every setting stayed unlocked, and updates pulled in just fine through local sources without breaking anything.