Windows 10: How to undo a Command in the Command Prompt?

Hello Microsoft community,I have a big problem in my Windows 10 Pro, I wrote something wrong in the Command Prompt idk How to write in english and when I try tô do any actions that restart the notebook or turn It of, the spinning thing doesnt appear and It never restarts/turns off, I have to go to the button in my notebook and everything I tried to correct isn't concluded, please, I need help as soon as possible.

:)

 

command prompt will not open in safe mode with command prompt

Would I just follow the same steps within safe mode after hooking up to the other system?

 

command prompt will not open in safe mode with command prompt

I am repairing a laptop for a friend and I need to access windows in safe mode and the owner has forgotten the password to the main user. I tried logging on with the administrator profile in safe mode but it is not showing up so I was going to use command prompt in safe mode with command prompt but command prompt will not open when I boot that option. Does anyone have any hints for me to figure this out?

 

Help undoing these commands entered at command prompt

Most of the Windows defender settings are easy configurable by commands in powershell
Start powershell by clicking on Start and type powershell, click on it to run
type

You'll get a list like the one below. You can change any of it by typing (example for PUAprotection:

Check my list and set it to fix your changes (names in reg entries are the same)
Another option is to download app named ConfigureDefender which has Defaults to restore