A very weird problem. For the letters a, o, s, and u, caps lock leaves them lowercase; it works for every other letter. I noticed it 3 weeks after getting the computer; I have a 1-year warranty. Any idea what this could be?
It happens in every program I have tried (word, notepad, chrome, and native windows 10 interfaces).
It also happens with the on-screen keyboard.
The shift key also has (a variant of) the same problem: after pressing any of the "cursed" keys, sometimes ALL keys will start being lower case.
It is fixed by making a new user (only for the new user)!
Disabling the program "autohotkey" which I installed does nothing.
Updating key/mouse drivers does nothing.
Specs: Lenovo Yoga 900 with 512GB ram & intel i7-6500u, 16GB ram. Windows 10 home.