Unable to change power settings (Windows 10) even though I'm an administrator [Solved]

I'm getting an error:

*Some settings are hidden or managed by your organization.

and

Figured out a solution after following some advice here (which i'll explain next):

http://www.tomshardware.com/answers/id-3271714/power-options-settings-managed-system-administrator.html

The steps I took were:

1. Open Group Policy Editor (Win+R, then type "gpedit.msc")
2. Navigate to [Computer Configuration]->[Administrative Templates]->[System]->[Power Management]
3. Double click the Specify a custom active power plan policy setting
4. Set to Disabled
5. Click Apply then OK

I was then able to change my power settings. Not sure how this got out of whack but this solved it for me.

Other things tried: 

Running "powercfg -restoredefaultschemes" in cmd as admin

https://answers.microsoft.com/en-us/windows/forum/windows_vista-security/i-cant-change-power-settings-even-though-im-logged/b028ab32-3337-43fd-ba31-57de166cd878

Setting diagnostics to "Full" (which seems to solve this for people seeing this message in the updates screen).

Running an in-place upgrade

Creating a new admin user account

Below are the users on the computer (I created "testuser" as that new admin user):