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Event ID: 4625 (Security - Audit Failure) on Server 2008 R2 SP1 64-bit

Last Modified: 2012-05-12
Hi, out of the blue, my 2008 R2 standard 64-bit SP1 server started spewing out these errors under event id 4625.  I have no idea what is causing this but I know that something is trying to use the guest account to sign on, which is disabled.  I have pasted the error below, thank you.

EVENT #      14139
EVENT LOG      Security
EVENT TYPE      Audit Failure
OPCODE      Info
SOURCE      Microsoft-Windows-Security-Auditing
CATEGORY      Logon
EVENT ID      4625
DATE / TIME        10/31/2011 1:50:27 PM
MESSAGE      An account failed to log on.

Security ID: EM24-INTER\administrator
Account Name: administrator
Account Domain: EM24-INTER
Logon ID: 0x501c8ca8

Logon Type: 3

Account For Which Logon Failed:
Security ID: NULL SID
Account Name: Guest
Account Domain: ES2011A

Failure Information:
Failure Reason: Account currently disabled.
Status: 0xc000006e
Sub Status: 0xc0000072

Process Information:
Caller Process ID: 0x195c
Caller Process Name: C:\Windows\explorer.exe

Network Information:
Workstation Name: ES2011A
Source Network Address: -
Source Port: -

Detailed Authentication Information:
Logon Process: Advapi
Authentication Package: Negotiate
Transited Services: -
Package Name (NTLM only): -
Key Length: 0

This event is generated when a logon request fails. It is generated on the computer where access was attempted.

The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.

The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).

The Process Information fields indicate which account and process on the system requested the logon.

The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.

The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
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