The sticker features a ninja cat carrying a Microsoft flag and riding on a fire-breathing unicorn. It used to be available to company employees, developers, or people who knew someone who worked there.
"@order the coveted Microsoft 'Ninja Cat Unicorn' sticker http://t.co/UeVHK1nLjX pic.twitter.com/FPnxhUz5L0" just ordered one!
- yaron zeev (@yaronzeev) March 12, 2015
People got quite excited about the laptop stickers. The flag, which is made up of the four colours of Microsoft Windows, is adorned with a small Windows logo and an Xbox sign. It's almost like a coat of arms - the ninja cat is knight-like, riding upon a powerful and gallant steed.
The Verge writes that the sticker helps to make Microsoft look cool again. It explains that because so many people expressed their desire to own it, Microsoft decided to list it on the online store. Unfortunately, it looks to have since vanished from the site at the time of writing.
It's still on sale on Redbubble, though. Windows Central found the product listing, and it notes that the art was designed by "memeshe."