I bought my Acer Predator G9-791 in 2017
My first post about sticky keys was in 2021. I assume that is when it started.
11-APR-2023 I finally found the answer for this case.
All the suggestions did not help.
Turn off sticky keys in Ease of Access
Change the registry
Rename sethc.exe (this one disabled booting)
I finally said ENOUGH. I'm going to kill this thing.
Every time I booted Windows, sticky keys started. Sure, when I pressed two keys simultaneously it shut off but what the heck. The boot disable made me sure something was requiring sticky keys at boot.
Then I looked at something I never use. Acer's PredatorSense.
Oh, look what I found. This crazy thing was unchecked.