What is ssdpsrv.dll?

The genuine ssdpsrv.dll file is a software component of Microsoft SSDP Discovery Services by Microsoft.
"ssdpsrv.dll" is a dynamic link library file in Windows that provides SSDP Discovery access and hosts messages for the SSDP Discovery Tool, which is part of Microsoft Windows operating systems. It listens for and discovers devices on a network that utilize SSDP discovery protocol. The file also provides network client PCs with information on available SSDP services within the network. Devices that use SSDP can often be UPnP (Universal Plug-n-Play) devices. Microsoft began in 1975 and provides cutting-edge software and hardware use by millions across the globe. This file is one of millions used in their leading Windows Operating Systems.

SSDPSrv stands for Simple Service Discovery Protocol Service

Ssdpsrv.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if ssdpsrv.dll is a Windows system file or if it belongs to an application that you can trust.

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Ssdpsrv.dll file information

The process known as SSDP Service DLL belongs to software Microsoft Windows Operating System or Servizio di rilevamento SSDP (SSDPSRV) by Microsoft (

Description: Ssdpsrv.dll is not essential for the Windows OS and causes relatively few problems. Ssdpsrv.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 71,680 bytes (77% of all occurrences), 162,816 bytes or 155,648 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs. The file is a trustworthy file from Microsoft. The program is not visible. It is not a Windows core file. The application is not active. Therefore the technical security rating is 0% dangerous.

Recommended: Identify ssdpsrv.dll related errors

Important: Some malware disguises itself as ssdpsrv.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the ssdpsrv.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


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Best practices for resolving ssdpsrv issues

A clean and tidy computer is the key requirement for avoiding problems with ssdpsrv. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the ssdpsrv.dll process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

ssdpsrv.dll [all]