In this tutorial how to change Administrator password on windows server 2012 r2. First you need to boot your pen-drive  include any iso file. Then follow thus step below:

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Step #01: Now attached your pendrive on your server then reboot machine.

Press any for connect booted pendrive. As like image below

Step #02: Start your PC installation process.

Don’t worry it’s not fully installation process new click Next button  then click Repair your computer. 

Step #03: Now click second option Troubleshoot

then open new popup click second option Command Prompt so you can see Administrator command prompt. 

Step#04: Run below command

X:\Source>d:
D:\>
D:\>cd windows\system32
D:\>Windows\System32>
D:\>Windows\System32>ren utilman.exe utilman.exe.old
D:\>Windows\System32>copy cmd.exe utilman.exe
	1 files copied.
D:\>Windows\System32>exit

Then click Continue button and remove your booted pendrive. Lets start your computer then click Ease of access

Open command prompt the type below command.

C:\>cd windows\system32>net user administrator P@ssw0rd@123
The command completed successfully.

Now login your changed password and enjoy windows server 2012 r2.

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Admin

I am system administrator as Windows and Linux platform. I have 4 years skilled from the professional period. I have to configure Linux based system such as an Asterisk VOIP system, Network monitoring tools (ZABBIX), Virtualization (XEN Server), Cloud computing (Apache CloudStack) etc. Now share my professional skill each interested person.
Thanks to all.

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