Demasiados errores de userenv en el log de aplicaciones

Es un servidor Windows 2000 Controlador de dominio. tengo el log lleno
de estos tipos de errores

Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1000
Date: 12/11/2008
Time: 9:57:29 PM
User: NT AUTHORITY\SYSTEM
Computer: SRVPRINCIPAL
Description:
Windows cannot process extension Scripts ProcessGroupPolicy. Return
value (0x2).

Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1000
Date: 12/11/2008
Time: 9:57:29 PM
User: NT AUTHORITY\SYSTEM
Computer: SRVPRINCIPAL
Description:
The Group Policy client-side extension Scripts was passed flags (17)
and returned a failure status code of (2).

Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1000
Date: 12/11/2008
Time: 9:54:08 PM
User: NT AUTHORITY\SYSTEM
Computer: SRVPRINCIPAL
Description:
The Group Policy client-side extension Scripts was passed flags (0)
and returned a failure status code of (2).




cada 5 minutos registran los 3 en el log.

que puedo revisar o porque pasara?

gracias!