Event ID - 5723

Event Id5723
SourceNetLogon
DescriptionThe session setup from the computer %1 failed because there is no trust account in the security database for this computer. The name of the account referenced in the security database is %2.
Event InformationThe account might not exist in the security database. Verify that the account exists or retry by joining the computer to the Domain .

Following MS articles will give more information about this event.
Reference LinksWindows NT Server 4.0 Standard Edition:
NetLogon Service Fails When Secure Channel Not Functioning

BDC Secure Channel May Fail If More Than 250 Computer Accounts

Windows XP:
"Windows cannot connect to the domain" error message when you try to log on to a Windows NT Server 4.0 domain

A Windows XP Client Cannot Log On to a Windows NT 4.0 Domain

5146 » Windows XP client cannot log on to a Windows NT 4.0 domain?

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