https://www.bleepingcomputer.com/new...of-hp-laptops/The audio driver installed on some HP laptops includes a feature that could best be described as a keylogger, which records all the user's keystrokes and saves the information to a local file, accessible to anyone or any third-party software or malware that knows where to look.
There is a list of models further down in the article, but the chipset used (Conexant) may be in other manufacturers.