SSDP Discovery (SSDPSRV) Service Defaults in Windows 7

Discovers networked devices and services that use the SSDP discovery protocol, such as UPnP devices. Also announces SSDP devices and services running on the local computer. If this service is stopped, SSDP-based devices will not be discovered. If this service is disabled, any services that explicitly depend on it will fail to start.

Default Settings

Startup type:Manual
Display name:SSDP Discovery
Service name:SSDPSRV
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalServiceAndNoImpersonation
File:%SystemRoot%\System32\ssdpsrv.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SSDPSRV
Privileges:
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege

Default Behavior

SSDP Discovery is a Win32 service. In Windows 7 it won't be started if the user doesn't start it. When the SSDP Discovery service is started, it is running as NT AUTHORITY\LocalService in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If SSDP Discovery fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the SSDPSRV service is not running because of the error.

Dependencies

SSDP Discovery is unable to start, if the HTTP service is stopped or disabled.

If SSDP Discovery is stopped, the following services cannot start:

Restore Default Startup Configuration for SSDP Discovery

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

1. Run the Command Prompt as an administrator.

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 %WinDir%\System32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.