Your issue might be related to this one here which only appears on educational copies. Worth a shot:
Windows Brightness issue after the 1809 update
hello , Yesterday I installed the 1809 update , and today i noticed that each time i restart my laptop the brightness level is being reset automatically to 0% or 25-50 i'm not really sure , and after windows will boot up , i will need to manually adjust the screen brightness again to 100% . I searched the web and i found this https://www.windowscentral.com/windows-10-october-2018-update-common-problems-and-fixes#fix\_brightness\_windows10\_1809 , and it might be an update issue i think , by the way , my power plan is set to maximum performance and my laptop is always plugged in , and solutions or ?
Windows for home | Windows 10 | Windows update
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Anonymous
2018-12-11T13:17:04+00:00 -
Anonymous
2018-12-11T13:54:14+00:00 I can confirm that the "enable adaptive brightness" setting is permanently gone and it probably won't come back
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Anonymous
2018-12-11T21:46:03+00:00 hello , Yesterday I installed the 1809 update , and today i noticed that each time i restart my laptop the brightness level is being reset automatically to 0% or 25-50 i'm not really sure , and after windows will boot up , i will need to manually adjust the screen brightness again to 100% . I searched the web and i found this https://www.windowscentral.com/windows-10-october-2018-update-common-problems-and-fixes#fix\_brightness\_windows10\_1809 , and it might be an update issue i think , by the way , my power plan is set to maximum performance and my laptop is always plugged in , and solutions or ?
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Anonymous
2018-12-11T21:47:26+00:00 ...and... Yesterday the laptop let me know another update was being loaded -- with exactly the same KB number as the fix a day before.
This time, restarts do continue with correct brightness, at least so far.
Crossed fingers, but in any case, at least there's a finger workaround if the round-about turns out still not right...
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Anonymous
2018-12-11T21:49:33+00:00 Touchvpn