UPDATE: got it to work. This solution worked:
touch screen on stream 11 x360 not working after windows 10... - HP Support Forum - 5188892
"I installed the windows 8.1 version of "Intel Serial IO...

Nope, cant find a single one. Looked at the driver download for every single HP windows tablet model that I can find on their site and all they have (for some of them) is the general intel HD video...

Glad to see these posts so current.

I created an account just to post in this thread, as I too am having the EXACT same issue with the same unit (HP Stream x360)

I installed windows 10. All...