As reported in a BBC news article, there is a security flaw in HP notebook computers that allows malicious keylogging. According to the article, "HP said more than 460 models of laptop were affected by the 'potential security vulnerability'." The problem extends all the way back to 2012.
I had purchased an HP notebook only last month and discovered my machine was one of those affected. I immediately went to the list provided by HP and downloaded the security patch via FTP with no problem.
The keyloogger, discovered by security researcher Michael Myng, was initially built into the Synaptics Touchpad software for debugging purposes and is turned off by default. Hackers could nevertheless gain access to it and enable it.