Putting the two hints together, we know that the treasure can be found on a TV stand in the Operations Room.

Use the gem you got from the Unicorn Trinket Box to open the Unicorn Door near the kitchen. That unlocks an upgrade room where you can spend the Antique coins you find. You'll also find the East Wing ...

Opening puzzle box in the Chairman's Office in the West Wing will get you the Moon quartz.

Windows 11 26H2 is the next major free update for all Windows users. Among other things, it brings improvements to Explorer, camera control, and AI. Here's an overview.