What is "Secondary Logon" in my Windows XP service list? And how is "Secondary Logon" service related to seclogon.dll?

"Secondary Logon" is a Windows XP service that "Enables starting processes under alternate credentials. If this service is stopped, this type of logon access will be unavailable. If this service is disabled, any services that explicitly depend on it will fail to start." "Secondary Logon" service is provided by seclogon.dll DLL file.

Detailed information on "Secondary Logon" service:

Service name: seclogon
Display name: Secondary Logon
Execution command: C:\Windows\system32\svchost.exe -k netsvcs
Start type: Manual
Service status: Stopped
Dependencies: None

"Secondary Logon" service is provided by a DLL file called: seclogon.dll:

Name: seclogon.dll
Location: C:\Windows\System32\seclogon.dll
Description: Secondary Logon Service DLL
File version: 6.1.7600.16385
Size: 21.0 KB (21,504 bytes)
Modified: Monday, July 13, 2009, ?9:16:13 PM

Disabling "Secondary Logon" service should not cause any issues when running Windows XP system.

⇒"svchost.exe -k netsvcs" Services on Windows XP

⇒⇒Windows XP Services Tutorials