https://www.bleepingcomputer.com/news/security/keylogger-found-in-audio-driver-of-hp-laptops/
According to researchers, the keylogger feature was discovered in the > Conexant HD Audio Driver Package version 1.0.0.46 and earlier. > This is an audio driver that is preinstalled on HP laptops. One of the > files of this audio driver is MicTray64.exe > (C:\windows\system32\mictray64.exe). > This file is registered to start via a Scheduled Task every time the user > logs into his computer. According to modzero researchers, the file > "monitors all keystrokes made by the user to capture and react to functions > such as microphone mute/unmute keys/hotkeys." > *This behavior, by itself, is not a problem, as many other apps work this > way. The problem is that this file writes all keystrokes to a local file > at:* > *C:\users\public\MicTray.log* -- Espi

