Event ID 1000 Is Logged in the Application Event Log  
 
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The information in this article applies to:
 
Microsoft Windows 2000 Professional  
Microsoft Windows 2000 Advanced Server  
Microsoft Windows 2000 Server
 
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SYMPTOMS
The following event may be logged in the Application event log:  
 
Event ID: 1000
Event Source: Userenv
Description:
Windows cannot determine the user or computer name. Return value (1722).  
The client computer may also experience an extremely slow logon.  
 
 
 
CAUSE
This behavior can occur if the address for the configured preferred DNS server on the client is invalid or unreachable.  
 
 
 
RESOLUTION
To resolve this behavior, correct the DNS address in the Internet Protocol (IP) properties:  
 
Right-click My Network Places, and then click Properties.
 
 
Right-click Local Area Connection, and then click Properties.
 
 
Click Internet Protocol (TCP/IP), and then click Properties.
 
 
Type the correct DNS address in the Preferred DNS server box.