My keyboard and track pad suddenly stopped working at the same time on my HP Envy laptop. I think it was after updating a whole lot of drivers, but I cannot be sure as I generally use USB keyboard/mouse.
In Device Manager, the keyboard is not showing up at all (even if I select to display hidden devices). The track pad displays, but it shows the following error:
insufficient system resources exist to complete the api
I know that it is not a hardware problem, because if I start up in BIOS, both the keyboard and trackpad work correctly.
I also noticed that in Device Manager under Human Interface Devices there is something called ELAN EzTouchFilter which is displaying the following message:
This device cannot be started. (Code 10) A required I2C connection and/or interrupt resource was missing.
Attempting to update the drivers on either the trackpad or the Elan EzTouchFilter both just result in it telling me I already have the most up to date drivers.