Caller Process Name Network Information Workstation Name Source Network Address 1. Source Port 3. Detailed Authentication Information Logon Process Kerberos Authentication Package Kerberos Transited Services Package Name NTLM only Key Length 0 This event is generated when a logon request fails. It is g enerated on the computer where access was attempted. The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Win logon. How To Install An Over The Range Microwave Electrical Requirements there. Services. exe. The Logon Type field indicates the kind of logon that was r equested. The most common types are 2 interactive and 3 network. The Process Information fields indicate which account and p rocess on the system requested the logon. The Network Information fields indicate where a remote logo n request originated. Workstation name is not always availa ble and may be left blank in some cases. The authentication information fields provide detailed info rmation about this specific logon request. Transited services indicate which intermediate servic es have participated in this logon request. Package name indicates which sub protocol was used am ong the NTLM protocols. Key length indicates the length of the generated sess ion key. This will be 0 if no session key was requested. Frequent Event ID 3. Windows Schannel errors in the Event Viewer. Ok I got the problem solved on my system at least running Windows 8 Consumer preview I stumbled into this solution while trouble shooting a different DCOM error message that I kept getting In Group Policy Editor run gpedit. Computer Configuration Administrative Templates System Distributed COM Application Compatibility and enabled allow local activation security check exemptionsNo more Schannel or DCOM errors now Of course, im not suggesting this as a cure all from what Ive read on other forums, these schannel errors are quite common and are probably generated as a result of many possible different conflicts this is just what worked for me. But if. DCOM errors along with the schannel errors, its worth a try.