Нечто ломится к контроллеру домена с моей машины

The below event was classified as a CRITICAL security event warning.

Event ID: 529

Operating System : Windows NT Domain Controller

Event Origin Details:
   S.E.L.M. Event ID:        1320602868_000000000003251
   Date & Time:              07.11.2011 - 0:19:01
   Within N.O.Time:          No
   Source:                   Security
   Computer:                 MASTER
   User:                     NT AUTHORITY\SYSTEM

Logon Failure:
   Reason:                   Unknown user name or bad password
   User Name:                <Тут логин, под которым сижу на своей машинке>
   Domain:                   <Соответственно домен>
   Logon Type:               3
   Logon Process:            KSecDD
   Authentication Package:   MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
   Workstation Name:         //<имя моего хоста>

Extended Details:
   User SID:                 S-1-5-18

More Information:
User <пользователь моего хоста> from domain <ljvty> tried to logon (Type 3) from the machine
\\<имя моего хоста> to the machine MASTER and specified either a bad username or bad
password.

Possible causes for the generation of this event are
(1) An authorized user is entering wrong password
(2) A user is entering a wrong username
(3) If this event was preceded by a large number of failed logon attempts,
then it can be the case that an unauthorized user is trying to gain access
to that account via a brute force password guessing operation. 

Logon Type Legend : 
2 - Interactive (sitting at the console)
3 - Network (logon via share)
4 - Batch
5 - Service
6 - Proxy
7 - Unlock Machine
8 - Network logon using a clear text password
9 - Impersonated logon (logon using alternative credentials)
10 - Terminal Server session that is both remote and interactive
11 - Cached Interactive (uses cached credentials without accessing the
network)
12 - Cached Remote Interactive. 
13 - Cached Unlock (workstation unlock).