Si es el evento con id 5719:No Windows NT Domain Controller is available for domain <domain name>
Mirate
http://www.eventid.net/display.asp?e...TLOGON&phase=1
Tras leertelo , verás que puede ser por fallo de la electrónica de red o de red ( hub / switch o cableado )
This is typically a connectivity problem
o por otras razones ...( Error: "There are currently no logon servers available to service the logon request." - The reason was that Active Directory had settings for a trusted domain that did not exist. When I deleted all references to that trusted domain, Windows quit logging the events.
) pero hay que leer e investigar ... suerte