Can't start Peer Name Resolution Protocol

OS: Windows 7 Ultimate 64

The posted solution works for many, but there are still an equal number of users for whom the solution has not worked, and who have requested additional support.

Anyone who has come across an alternate solution, please post for those of us still doing everything to troubleshoot this issue. Thanks in advance.
 

My Computer

OS
Windows 7 Ultimate 64
I have the same problem. "idstore.sst" was deleted from the PeerNetworking folder, but was not recreated upon restarting. Same error code when attempting to start PNRP. Would it be possible for someone with a functioning idstore file to upload it for download? I don't know how else to recreate the file, or if that will even fix the problem.

I too am having this same problem and have done the same as "al3x3691" with the same results, still not working. I am attempting to use my laptop and my desktop to establish my connection and my laptop Win7 64bit tells me it cannot remove it from the homegroup. My desktop has been removed from the homegroup, using Win7 Ultimate SP1 32bit.

ANY help would be of GREAT assistance to many of us Newbies, Unknowings, Dummies, et ceteras . . .

TIA, CU L8R,
NTxLS
 

My Computer

Computer Manufacturer/Model Number
Dell Inspiron 531s + Inspiron 1564
OS
Win7 x64, Win7 Ult x32
CPU
AMD Athlon 64 x2 Dual Core, Intel Core i3
Motherboard
???
Memory
4Gig
Graphics Card(s)
??
Sound Card
??
Monitor(s) Displays
Dell 17" Flat Scrn
for those that can't see the file

This fix worked for me as all the others that deleted the file.

At first i couldn't find the folder, so I did a search for the filename and it showed up, even though i couldn't browse to the folder. Then, I right clicked on the search result and deleted the file.

The reason you can't see the file is because it is a system file, which is hidden by default. To unhide system files, go to Start -> Control Panel -> Folder Options. Under the View tab, there is a yellow folder under advanced settings with two options. Choose "show hidden files, folders, and drives. Hope this helps!
 

My Computer

Computer Manufacturer/Model Number
custom built
OS
win 7 ultimate x64
CPU
core i3 550
Motherboard
asrock h55m le
Memory
4 gb crucial
Graphics Card(s)
HD 5850
Monitor(s) Displays
23" ASUS IPS
Hard Drives
Micron 256GB C300 SSD
PSU
Antec 520W Gamer series
Cooling
arctic cooling 92mm
"danko15"

Use the feature from 'Control Panel/Folder Options/[Tab] View select 'Advanced Settings, Hidden files and folders that, like you mentioned, are hidden by default and change to Show hidden files, folders and drives.' After making any other changes click the OK radio button.

I did find the folder and that file removed said file, yet it still will not work for me. Still awating more info from someone that knows much more than I. I am very glad that it worked for you and hope you have many more successes.
 

My Computer

Computer Manufacturer/Model Number
Dell Inspiron 531s + Inspiron 1564
OS
Win7 x64, Win7 Ult x32
CPU
AMD Athlon 64 x2 Dual Core, Intel Core i3
Motherboard
???
Memory
4Gig
Graphics Card(s)
??
Sound Card
??
Monitor(s) Displays
Dell 17" Flat Scrn
wow that was great work and great advice!!!


worked for me!

I actually had 2 problem, this one and a corrupted log file to where I couldn't view windows logs so i deleted the files under:
C:\Windows\System32\LogFiles\WMI\RtBackup

somehow those got screwed up as well.

Thanks
 

My Computer

Computer Manufacturer/Model Number
MyBuild
OS
Windows 7 64-bit/XP
CPU
QuadCore Intel Core i7 920, 2800 MHz (21 x 133)
Motherboard
Asus P6T
Memory
Corsair XMS3 6gb
Graphics Card(s)
eVga GeForce GTX275
Sound Card
Asus Xonar 7.1
Monitor(s) Displays
HP 2509m 25.5"
Screen Resolution
1920x1080
Hard Drives
WD Caviar Black 500GB x 2
WD Caviar Black 1TB
PSU
Corsair TX850
Case
X-Clio Windtunnel
Cooling
Intel
Keyboard
Eclipses II
Mouse
Razer DeathAdder
Internet Speed
Cable
Other Info
Old Dell Speakers and Razer Headphones
In my localservices folder is no Appdata folder, any idea where i can find the Idstore.sst then?

I have the same problem: no such folder is found in my localservices folder...
Been looking for hours and not finding a solution..
 

My Computer

OS
Windows 7 Home Premium 6
Maybe the next method will work (also for removing the computer from a Homegroup):
1. Delete all files in directory C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys. You also can rename this directory (p.e. in 'MachineKeys.old') and create a new directory 'MachineKeys'. To delete the files in the directory you need certain administrator rights. Eventually you can download from internet a (register)file to get the needed rights for deleting a file. Search in Google ‘Take Ownership windows 7 download’. I suppose you have to activate the 'Take Ownership' routine for each file you want to delete. If you have the needed rights, delete the files in the directory 'MachineKeys'.
2. Restart your computer.
3. Start the Troubleshooter Homegroup (Configurationscreen -> Homegroup). (I don't know what's the real name of the program and it's location in english). Choose within the troubleshooter also the network control option, if you are asked so.
4. Start services.exe. For instance by pressing the Start-button on the left lower corner in the taskbar. Typ ‘services’ in the searchwindow ‘Programs and files search’ and press [ENTER].
5. Choose op ‘Services (lokaal)’.
6. Start in the following order the services:
- Peer Networking Identity Manager
- Peer Name Resolution Protocol
- Peer Networking Grouping
You can start the services by clicking the right mousebutton, while standing on the service, and choose for 'Start'. (When the service isn't started already).
Next follow some extra steps to delete the homegroup, if you want so.
7. Try to delete the homegroup from the computer. If that doesnt work yet, run once again the Trouble Shooter Homegroep (inc. network control). Perhaps you can remove the computer bu then from the homegroup. At least as you want to do so.
 

My Computer

OS
Windows 7
Deleting the "C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\PeerNetworking\idstore.sst" file solved it for me too. Thanks for the quick solution. Some "experts" advised re-installing windows 7... yeah right.
 

My Computer

OS
Windows 7 Ultimate x64
thanks post no1 work for me and save d me with lots and lots of headache
 

My Computer

OS
Windows 7
How to Reset Windows Registry Permissions | Tech XE

above link is my self made guide to achieve the following

Maybe the next method will work (also for removing the computer from a Homegroup):
1. Delete all files in directory C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys. You also can rename this directory (p.e. in 'MachineKeys.old') and create a new directory 'MachineKeys'. To delete the files in the directory you need certain administrator rights. Eventually you can download from internet a (register)file to get the needed rights for deleting a file. Search in Google ‘Take Ownership windows 7 download’. I suppose you have to activate the 'Take Ownership' routine for each file you want to delete. If you have the needed rights, delete the files in the directory 'MachineKeys'.
 

My Computer

Computer Manufacturer/Model Number
Toshiba L300
OS
Windows 7
CPU
Core 2 Duo 2.0G T5800 (centrino)
Motherboard
Intel 4 series
Memory
2 GB
Graphics Card(s)
Intel GMA 128 MB
Sound Card
HD Audio
Monitor(s) Displays
15.4 "
Hard Drives
250GB Toshiba
WORKED.

1.unshare everything you have shared.

2.delete "idstore.sst" and "idstore.sst.new"

3.rename "a5691ef79c937250b91a4fde7c86f5db.sst.new" TO "a5691ef79c937250b91a4fde7c86f5db.sst.new.L"

4.disable you network card.

5. restart your PC.

6. try leaving homegroup NOW.

7. DONE........ :)
 

My Computer

OS
Windows 7 Ultimate x64
error: 0x806320a1

Solution Addition:
IF you are like me and tried manually starting the services as a different account etc, i.e. you probably changed the default settings for the account user info, that was a mistake, you will get this error: 0x806320a1

There is not a lot of information out there for this specifically, but the solution is really simple.

1) Delete idstore.sst

2) You want to go back to each service and change the Log On As options and log on user to "Local Service" (no quotes) and then edit the password so its blank. You will want to do this on ALL 3 services (don't forget to apply before closing). Then you should start them in the order 1,2,3 above. At his point you should be good to go, to run the HomeGroup self-diagnostics and then choose Refresh HomeGroup.
 

My Computer

Computer type
PC/Desktop
OS
Connecticut
The last one worked for me

I know this is an older forum posting but it worked out well for me. I tried all the fixes suggested here except the deleting or renaming MachineKeys file as I was unsure what that would do and no information was given.

The post preceding mine worked perfectly, I was now able to start all the services and leave the homegroup, for which I don''t have much use for right now.

Thank you all
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom build
OS
Win 7 Pro 64 bit SP1
CPU
AMD Athlon II X4
Motherboard
Asus Crosshair V-formula
Graphics Card(s)
SLI GTS 450
Yes! :party: For all which can not start Peer Name Resolution Protocol - see Eugenecist advice. Check carefully Log On tab. Make sure all 3 services (Peer ...) are set to Local Service. Enter your Log on Windows password and... voilà! You can start services.
(Btw, there is an advice here that these services should run in Local System Account, not as Local Service. I do not know the difference, in case of future problems will investigate more.)
Restart computer. Home group is here and errors in the event log gone away.
But why this happened, as Home Group worked yesterday I do not know also.
 

My Computer

Computer type
PC/Desktop
OS
Windows 7 Professional x64
I joined this forum just to say thank you!! This helped me as well. I shared it (with a link to here) on techspot, where I had first asked for help.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
home built
OS
Windows 7 Home Premium x64
CPU
core 2 duo E8500
Motherboard
Asus P5Q Pro
Memory
4 GB DDR2, OCZ Fatal1ty
Graphics Card(s)
480GTX
Hard Drives
OCZ Agilty 4 SSD (128GB)
WD Raptor (74 GB)
WD 640GB
Antivirus
Avira
Browser
IE11, Firefox, Chrome
I have been frustrated with this error for several days, and have researched many threads in this forum and others. I tried the delete *.sst files and that did not work. I tried resetting the login name and that did not work. Then I found a reference to the page link below -- did it (changing permissions on RSA files) and have been without the error for 8 hours now, instead of getting it every 10 or 15 minutes.

Event ID 102 ? PNRP Protocol

And just to give credit -- this was in a post by Streetwolf
http://www.sevenforums.com/network-sharing/29060-can-t-start-peer-name-resolution-protocol.html
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
DELL xps8500
OS
Microsoft Windows 7 Professional 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
Motherboard
Dell Inc. 0NW73C
Memory
16.00 GB
Graphics Card(s)
NVIDIA GeForce GT 620
Sound Card
(1) NVIDIA High Definition Audio (2) Realtek High Definiti
Screen Resolution
1280 x 1024 x 32 bits (4294967296 colors) @ 60 Hz
Hard Drives
(1) WDC WD10EZEX-75ZF5A0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Passport 0820 USB Device
Event ID 102 — PNRP Protocol

I tried what they outlined (it's for Vista) but to no avail. I have no idea what the connection is between RSA and P2P.
I want to thank you directly for the reference to that article. It led me to the fix for me. What it took was the resetting of permissions on LOCAL USER as was suggested there. I'd tried all of the other things in this thread and other threads without success.

These error messages have now gone away.
:D
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
DELL xps8500
OS
Microsoft Windows 7 Professional 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
Motherboard
Dell Inc. 0NW73C
Memory
16.00 GB
Graphics Card(s)
NVIDIA GeForce GT 620
Sound Card
(1) NVIDIA High Definition Audio (2) Realtek High Definiti
Screen Resolution
1280 x 1024 x 32 bits (4294967296 colors) @ 60 Hz
Hard Drives
(1) WDC WD10EZEX-75ZF5A0 (2) Generic- Compact Flash USB Device (3) Generic- MS/MS-Pro USB Device (4) Generic- SD/MMC USB Device (5) Generic- SM/xD-Picture USB Device (6) WD My Passport 0820 USB Device
researched the problem and found the solution. A file was corrupted and deleting it got the pnrp service running. The file was recreated correctly when the pnrp service started up. Here's the file for future reference:

"c:\windows\serviceprofiles\localservice\appdata\roaming\peernetworking\idstore.sst"


this worked like a charm.

Thanks thanks thanks:d:d:d:d:d:d:d
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUS
OS
win 7 ultimate x64
CPU
CoreI7@3Ghz
Motherboard
ASUS P8Z77V-Pro
Memory
64GB
Graphics Card(s)
Radeon HD7700
Hard Drives
Raptor 256GB
Samsung 850Pro 512GB
WB Black 2TB
Antivirus
Bitdefender 2015 Internet Security
Browser
Chrome
Sorry to necro this post. I have the same problems, but..
I can't find \PeerNetworking\idstore.sst
My files go to Roaming, but that is as far as I can go.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
custom build
OS
Windows 7 ultra 64 bit
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