The HP circle was placed on a rectangle. Starting in 2010, it's only an alternate logo.
This is the circle from the previous logo with the colors reversed, and removed from the rectangle. Introduced in 2010.
The logo had being refreshed with a new color and the monogram was made slightly larger. When this logo debuted in 2012, the previous logo and the darker tone version was still used on DWA films, newer products, commercials and online until 2012. Since November 2015, this logo is used by HP Inc. after the company split into Hewlett Packard Enterprise and HP Inc.