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"Peer Name Resolution Protocol" Service Could not be Started and HomeGroup Is not Working

"Peer Name Resolution Protocol" Service Could not be Started and HomeGroup Is not Working

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You cannot join a HomeGroup with an error message "Windows cannot set up a HomeGroup on this computer. Error code: 0x80630801".


In addition, you may observe the issue that "Peer Networking Grouping" service cannot be started on this computer.




The error code 0x80630801 means PEER_E_CERT_STORE_CORRUPTED. The Identity Store has been corrupted.

(Location: "C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\idstore.sst")




To resolve this issue, we need to delete idstore.sst from the %appdata%\peernetworking folder. Please follow the steps below:


1.     From an elevated CMD prompt, type in the following command:


Net stop p2pimsvc /y


2.     Delete the following file:




3.     Reboot the computer.


Then you should be able to join HomeGroup.




  • Hi,

    It didn't work for me either.

    I couldn't see my password.- fixed by deleting idstore

    I can't add a reinstall PC to the homegroup.

    Test on the host cant find/start group.

    Im hoping to fix it soon

  • I cannot start the Peer Name Resolution Protocol service either. It is preventing me from starting a HomeGroup. I received the error message: "Windows could not start the Peer Name Resolution Protocol service on Local Computer. Error 0x8009000f: Object already exists."

    Does anyone have an idea as to which object already exists? How do I delete the existing object? I have tried deleting the idstore.sst file without success. I have tried starting the computer in Safe Mode with Networking without success. I have tried a clean boot without success. No matter what I try, the service will not start.

    Any ideas?

    Technical Specifications:
    System Manufacturer: TOSHIBA
    System Model: Satellite S875
    System Type: x64-based PC
    OS Name: Microsoft Windows 7 Home Premium
    Version: 6.1.7601 Service Pack 1 Build 7601
    Processor: Intel(R) Core(TM) i7-3610QM CPU @ 2.30 GHz, 2301 Mhz, 4 Cores, 8 Logical Processors
    BIOS Version/Date: Insyde Corp. 6.80, 10/1/2013
    SMBIOS Version: 2.7
    Boot Device: \Device\HarddiskVolume1
    Installed Physical Memory (RAM): 16.0 GB

    Thank you, in advance, for your assistance.

  • Worked for me. Thank you.

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