Similar issue(s) with Windows 10 - cannot access as Administrator

[Janelda]

I have a similar situation as one mentioned here, but I'm completely lost. I cannot access Task Manager (CNTRL-ALT-DEL), cannot change ANYTHING within the Control Panel (also receiving the "unable to access the Group Policy ..." message upon start up) and CANNOT access my PC as administrator. When I followed the steps to get to the the Command Prompt window, I got this:

For one thing, I don't have a password for mymachine/administrator.

And while that window was still open, I get this error message - (command Prompt.lnk):

I'm completely lost and in need of help!!

Thanks - Janelda

 

[Norton]

I see the command prompt is the user CP. Try right click on command prompt >more > run as Administrator. You said you have no admin password, I'm sure I recently read somewhere that the default Admin password not password protected by default, same as guest account.
default. I'm just grasping at straws here trying to help. I know someone here will have the correct procedure. You are the Administrator did you set up the account as standard local user?

 

[Trouble]

You might be able to rescue your computer by enabling the normally hidden / disabled Administrator account and use that to possibly fix the password problem on your local user account.
You'll need to boot from the installation media. If you do not have the installation media on hand you can download the ISO from here
https://www.microsoft.com/en-us/software-download/techbench
Once you have the ISO, you can use ImgBurn to burn it to a DVD or Rufus to burn it to a USB ThumbDrive, either of which you can use to boot your computer.
THEN...
Follow the steps outlined here
http://pureinfotech.com/2015/11/20/how-reset-windows-10-forgotten-password-regain-access-computer/

Another option that I have used successfully is a third party software boot disk.
http://pogostick.net/~pnh/ntpasswd/
NOTE.... IF the computer is UEFI with "Secure boot" enabled, I don't believe you will be able to boot from the CD you create from the ISO (Offline Windows Password & Registry Editor, Bootdisk / CD, the pogostick link immediately above) unless you enter the System Setup Utility (BIOS) and turn off Secure Boot and change the boot option from UEFI to Legacy or UEFI + Legacy or UEFI + MBR depending on what's avaialble and how robust your BIOS might be (if it even supports changing turning off secure boot, some newer ones do not.