How to Fix the Defaultuser0 Account Problem in Windows 10?
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Summary
1. Why did Windows 10 Create defaultuser0? What is the Login Password?
Some users said that they came across the defaultuser0 problem after they installed Windows 10 system image from Microsoft’s website. And some users said that Windows 10 automatically restarted after it was reset. Unexpectedly, the unknown defaultuser0 account appeared even restart computer.

Tips: What is defaultuser0 account?
Defaultuser0 is a temporarily created account while system is installed. It does not belong to any users or equipped with any configuration file. However, you will be required to enter the password when it is listed in the login screen. From the support team of Microsoft, there is no correct password for defaultuser0 since the account has been encrypted. Actually, we can create new account, disable the defaultuser0 or even reset its password to solve this problem.
2. Can not Login Windows 10 with defaultuser0?
Approach 1: Create New Account / Disable Account or Remove Login Password

Remove Windows Login Password 3 steps for whole password remove process.
Enable/Create Administrator One click for creating new administrator and enable the disabled account.
Widely Use New version supports UEFI boot model, which can be used on more computers, laptops and even surfaces.
Multifuctional Data transfer, data recovery, bootable problem recovery can be run without system.
Highly compatible Windows 10/8.1/8/7/XP/Vista.
Remove Login Password 3 steps for whole password remove process.
Enable/Create Administrator One click for creating new administrator and enable the disabled account.
Easy to use No need of any professional knowledge or password reset disk.

You will boot the target computer via a new created reset disk. Firstly, please hold a hot key to enter the BIOS menu and put CD-ROM or Removable Devices as the first choice. Please click here to know about how to change the boot order of your computer. After changing it successfully, please remember to save your setting and then restart your PC.


The created administrator account named “Reneelab” with administrator rights, and its default password is “123456789”. You are able to change the password of target account with this new created administrator.


Approach 2: Enable Safe Mode and Create New Account
Step 1: Hold “shift” key and click the “Power” on the right bottom of the login screen. Then click “Restart” at the same time to enter “Choose an option”.
Step 2: Select these options in order “Troubleshoot” – “Advanced options” – “Startup Settings“. Finally, click on “Restart” on the screen of Startup setting.

Step 3: After restarting the computer, please press “F6” or “6” to enable safe mode with command prompt.

Step 4: When you get into safe mode, you will see Administrator command prompt. Please type in: net user aaa(New Account name) /add, and then press “Enter“.
If you want to set a password for the new account, you can type in: net user XXX(New Account name) bbb(Password ) /add

Step 5: Restart the computer after the command completed. Then you can use the new created account to access Windows 10.

3. How to Enhance the Safety of defaultuser0?
Option 1: Set Login Password for defaultuser0

Option 2: Hide defaultuser0


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