Video tutorial
Step 1: Create a password reset disk on an accessible computer using PassFab 4WinKey.

Step 2: Insert the password reset disk into the locked computer. Select the Windows operating system.

Step 3: The Windows password has been successfully removed or reset.

Method 2: Reset Windows Server Admin Password with Password Reset Disk
A password reset disk is a must-have tool if you forget your password.That is why, whenever creating a password for a Windows user account, we always suggest users to make a password key disk. If you have the password reset disk, follow the directions below to perform a Windows server Raid computer password reset.
It is always recommended to configure a Password Reset Disk on your Active Directory server to avoid any serious lockout situations. But the fact is that if you are not using or maintaining this feature, it can create more problems than helping in emergency situations where you need to get back control over your Domain.
Follow Below Steps to unlock your windows server without data loss with password reset disk:
Step 1: When you enter the incorrect password, click the “Reset password” link under the password entry box.

Step 2: Insert your password key disk you made before you forgot the administrator password and click Next, then choose the disk drive in the list box.

Step 3: On the next screen, type in a new password twice and a hint for your password. To finish the wizard, click “Finish.” You may now log into your computer with the new password.

PROS:
No Data Loss.
This method is effective if you had created the disk before forgetting the password.
No need for any expensive software.
CONS:
Time taking method.
If not created disk before forgetting, impossible to do.
Complex method for most windows server users.
Method 3: Reset WIndows Server Admin Password with Command Prompt
Resetting Windows Server Admin Password with Command Prompt is quite easy, if you know the trick. And we are showing you the trick, here. We’ll be using a command prompt to execute commands and reset Windows Server Admin Password with Command Prompt securely and effectively. And we promise that your system will never get back to its previous state .
If you have a Windows Server installation DVD, you may use it to reset the administrator password in a Command Prompt window. You can execute the following commands.
Step 1: Insert the installation disk and restart your computer. When the Windows Setup screen appears, press the Next button.

Step 2: Select Option which is to repair your computer. Click on Troubleshoot option.
Then finally click on the Command prompt.

Step 3: Start writing command in command prompt,
d: cd windows\system32
ren Utilman.exe Utilman.exe.old
copy cmd.exe Utilman.exe

Step 4: Click “Continue” after closing the command prompt window. The server should now boot and display the login screen. Select Windows Key + U from the keyboard.

Step 5: Type the following command at the password prompt to change the password: Administrator as a user and password as per your choice for e.g. password123.

Step 6: To set the administrator’s password, click here and then enter a new password (case-sensitive) for the Administrator user.
You can now log back into the server with the new password since you’ve closed the command window. Don’t forget to remove the Utilman.exe file from C:\Windows\System32 and then rename Utilman.exe.old back to Utilman.exe before deleting it.
PROS:
No paid software is required for this method.
All the data will be safe. No data loss in this method.
Simple process just follow the steps and you can unlock the windows server easily.
CONS:
If the Command prompt will not open, then you can not do this method.
If you don’t have a bootable device then do not use this method.
Time taking method.
Conclusion:
This Blog post covers the three best methods for Reset Windows Server Password with or without Disk.
First method is about a software named PassFab 4WinKey, with this software you can create a windows password reset disk on USB or any CD.
Second method is about using Reset Windows Server Admin Password with Password Reset Disk. If you have created a password reset disk before locking windows then you simply use that disk and unlock your windows.
Third method is about the Command prompt method by which you can unlock your computer by using some codes which are placed in the command prompt for unlocking.