https://zwclose.github.io/HP-keylogger/
[…]The research were done by reading the code of SynTP.sys, I couldn’t verify if it’s correct or not. I tried to find HP laptop for rent and asked a few communities about that but got almost no replies. One guy even thought that I am a thief trying to rob someone. So, I messaged HP about the finding. They replied terrificly fast, confirmed the presence of the keylogger (which actually was a debug trace) and released an update that removes the trace. Get the list of affected models and fixed driver at HP website. The update also available via Windows update.[…]
https://zwclose.github.io/HP-keylogger/
Firmware Security 