Windows Vista Services

Peer Name Resolution Protocol - Windows Vista Service

Enables Serverless Peer Name Resolution over the Internet. If disabled, some Peer to Peer and Collaborative applications, such as Windows Meetings, may not function.

This service also exists in Windows 10, 7 and 8.

Startup Type

Windows Vista edition without SP SP1 SP2
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Default Properties

Display name:Peer Name Resolution Protocol
Service name:PNRPsvc
Path:%WinDir%\System32\svchost.exe -k LocalServiceNetworkRestricted
Error control:normal
Object:NT AUTHORITY\LocalService
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege
  • SeImpersonatePrivilege

Default Behavior

The Peer Name Resolution Protocol service as NT AUTHORITY\LocalService and runs in a shared process of svchost.exe. If Peer Name Resolution Protocol fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the PNRPsvc service has failed to start. If you disable this service, then 2 other services will be unable to start (see the "Dependencies" section below).


Peer Name Resolution Protocol will not start, if the Peer Networking Identity Manager service is stopped or disabled.

If the Peer Name Resolution Protocol is stopped, the following services will not start and initialize:

Restore Default Startup Type of Peer Name Resolution Protocol

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestorePeerNameResolutionProtocolWindowsVista.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the p2psvc.dll file exists in the %WinDir%\system32 folder. If this file is missing you can try to restore it from your Windows Vista installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.