Its not normal for windows to change your settings
Do you have 2 PC? its possible its a setting on the cloud that changes it whenever you logon. If you use 2 PC, go to settings/accounts/sync settings
turn it off and see if it makes any difference. I don't think power settings are saved here but maybe.
I am curious what happens in safe mode
change power settings before doing this
- go to settings/update & security/recovery
- under advanced startup, click restart now button
- this restarts PC in a blue menu
- choose troubleshoot
- choose advanced
- choose startup options
- click the restart button
- choose a safe mode (it doesn't matter which) by using number associated with it.
- Pc will restart and load safe mode
now check settings and see if its still set as it was. I wonder if its a driver doing it. If it doesn't happen in safe mode its likely a driver.
there is a chance settings doesn't work in safe mode, its been a while since I used it myself