Windows Event Log ID 675

When analyzing an event ID 675 log, is it normal to have the user name field reference a computer name followed by a dollar sign?  Is this normal?  Should I worry? Furthermore, is there any good literature/website out there that identifies all the event log IDs? Example:

Event Type:      Failure Audit
Event Source:      Security
Event Category:      Account Logon
Event ID:      675
Date:            9/30/2008
Time:            5:59:12 AM
User:            NT AUTHORITY\SYSTEM
Computer:      SERVER
Description:
Pre-authentication failed:
       User Name:      COMPUTER$
       User ID:            DOMAIN\COMPUTER$
       Service Name:      krbtgt/DOMAIN.COM
       Pre-Authentication Type:      0x2
       Failure Code:      0x18
       Client Address:      172.16.200.78


For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
rodriguj79Asked:
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ExpertheadCommented:
Yes it is normal for the user name field reference a computer name followed by a dollar sign.
Here is some detailed info on why it relates: http://msdn.microsoft.com/en-us/library/aa370254(VS.85).aspx
 Here is some info on the Audit 675 event error: http://www.tech-archive.net/Archive/Windows/microsoft.public.windows.server.sbs/2006-07/msg01377.html
 
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Windows Server 2003

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