SSDP Discovery Service (SSDPSRV) Defaults in Windows XP

Enables discovery of UPnP devices on your home network.

Default Settings

Startup type: Manual
Display name:SSDP Discovery Service
Service name:SSDPSRV
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalService
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SSDPSRV

Default Behavior

SSDP Discovery Service is a Win32 service. In Windows XP it won't start until the current user starts it. When the SSDP Discovery Service is started, it is running as NT AUTHORITY\LocalService in a shared process of svchost.exe. Other services and drivers are allowed to run in the same process. If the SSDP Discovery Service fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the SSDPSRV service has failed to start.


SSDP Discovery Service depends on the HTTP service.

The Universal Plug and Play Device Host depends on the SSDP Discovery Service service.

Restore Default Startup Configuration of SSDP Discovery Service

Before you begin doing this, make sure that all the services on which SSDP Discovery Service depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt.

2. Copy the command below, paste it into the command window and press ENTER:

sc config SSDPSRV start= demand

3. Close the command window and restart the computer.

The SSDPSRV service is using the ssdpsrv.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows XP installation media.