Windows Activation Error "an unauthorized change was made to windows server 2008"

While logging into one Windows 2008 servers, i got below error message and not allowing me to login to the server. 

an unauthorized change was made to windows server 2008

Windows 2008 is showing error window, "an unauthorized change was made to windows windows server 2008".

You will no longer receive notifications, including those about your license or activation.

Error No. 0xC004D401

The security processor reported a file mismatch error.

This Server is not loging to Administrator.  It showing the message upto Preparing your desktop.  after that the same error is showing. As per the error I can see that the issue is with the Windows License\Activation problem.

So, i need to verify the windows licensing options on the server but server is not showing any other consoled other than error page.

Then, below steps were worked me to get the server back to normal mode.

1) Click the option that launches an Internet Browser

2) Type: %windir%\system32 into the address field

3) Find the file cmd.exe

4) Right-click on cmd.exe and select Run as Administrator

5) Type: cscript %windir%\System32\slmgr.vbs /ilc %windir%\System32\licensing\ppdlic\Security-Licensing-SLC-ppdlic.xrm-ms

6) Hit the Enter key

7) Reboot the server. 

After executing these steps on the server, it came to normal login console and allowed me to login. 

Thank You !!!