Restore Missing Default Power Plans in Windows 10  

Hi Brink, there's good and bad news
The good news: I was able to restore all missing power plans. The bad news: the restored power plans show up as long as Modern Standby is disabled (value 0 in csenabled registry key).
Here is what I did:
I started having "Balanced" as the only power plan displayed. I then disabled Modern Standby as you suggested and multiple instances of the various power plans showed up as seen below:

So I then went ahead to delete the added power plans to start from a clean state using your instructions
I then added the power plans using Powershell as explained in this thread. The power plans were added successfully as shown below:

I then enabled Modern Standby, rebooted and this was the result:

So I disabled Modern Standby and finally got back the missing power plans again:

Also I observed another change: now, the power icon in system tray does not show the slider to set it to save or best performance, as seen below:

So the question remains: how to have Power in Control Panel show all Power Plans without having Modern Standby Disabled.

@antares,

It appears you won't be able to with Modern Standby disabled.

antares said:

what does "Standby" stand for? Is it the same as Sleep or Hybernate? and what feature/s does "Modern" add?

Modern Standby is a very low power state that allows an instant on/off experience for your PC like a smartphone.

Here's some more reference info from Microsoft below about it. Please let me know if you have any questions.

Modern Standby | Microsoft Docs

Power models and the advantages of using Modern Standby | Microsoft Docs

@antares,

It really depends on what you would prefer to use.

"Ultimate Performance" will have your processor always running at full speed. The "Balanced" plan just won't do that.

Autobahn said:

I have just got a new Dell G15 laptop.
Concerning the Power Plans, should I use the Dell Balanced Power Plan or the other Balanced Power Plan that is available which I guess is Microsofts?
They seem to do the same thing but is the Dell Balanced Power Plan designed to do things even better?

Hello Autobahn,

I would use whichever power plan is best suited for your needs and wants after looking through each's settings.

The Dell plan would be more specific for your laptop, while the built-in plan in Windows 10 is more generic. Either way, both can have their settings changed to what you like.