After a Windows 10 upgrade brightness control won't work

[Joaode Borba Neto]

After an automatic upgrade on Windows 10, brightness control won't work. Brightness is stuck to maximum. My laptop is an ACER Aspire 5742, with Intel HD Graphics. I have already tried to change display driver on Device manager to Microsoft and still it's too bright. Have already tried to uninstall it but after restart Intel Graphics is automatically reinstalled. Brightness controls (Fn key) aren't working. Need help before my I get blind.

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