This works for Windows 10 for writers in English. Left click the Windows icon on the task bar and choose Settings. Click 'Time & Language' then 'Region & language' on the left-hand of the panel that opens up. Next click on 'Add a language' and choose 'English'. A panel will open with a range for 'English' eg., English (New Zealand). Select the kind you want and this will appear beneath the one which is currently active. Click the new one, set it as the default option and it will move to the top.
Hold down the alt gr key on the right of the space bar and tap 2 key. Using the alt button on the left of the space bar doesn't work. Really weird keyboard on Acer. I asked this question on the "experts" forum a couple of months ago and they couldn't help me, nothing worked. Tonight a techie friend discovered the answer by accident.
FYI, the problem stems from loading the incorrect 'keyboard language' at start-up. The keyboard language determines what instructions the computer receives as you type individual keys. In other words, if you see " instead of the expected @, the computer is behaving in accord with the default 'keyboard language'.