Event Id 4625

Error: The Local Security Authority cannot be contacted

I recently came across an issue where a user tried to log into a Windows Server via Remote Desktop Connection but was unable to. The following error was displayed: Searching through the server security logs, I came across the following error: Log Name: Security Source: Microsoft-Windows-Security-Auditing Date: 4/4/2013 11:10:10 AM Event ID: 4625 Task Category: Logon Level: Information Keywords: Audit Failure User: N/A