Error 1747 : The Authentication Service is Unknown
August 25, 2009Today I had a newish Windows Vista machine that had the following error:
Error 1747 : The Authentication Service is Unknown
This error occurred when I attempted to start the “Windows Event Log Service”.
The problem was reported to me as an issue with connecting to the internet. I soon discovered that it was much more than that when I was unable to do an ipconfig /renew due to some kind of RPC error.
Upon checking the event log for this error I discovered that there are no logs because the service is not running.
It was when I tried to start the service that I got the error, which I thought could be the root of the problem.
At first I thought it was some kind of permissions issue. It wasn’t.
To fix this, you must run command prompt (cmd) as an administrator.
To do this on Vista, the easiest way for most people is to search for “cmd” using the start menu search, then right click on the result and select “Run as administrator”.
From here, you need to run the following command:
netsh winsock reset
I found that this returned the following message:
Initialization function INITHELPERDLL in IPMONTR.DLL failed to start with error code 10107
However it seemed to fix the problem regardless, AFTER IT WAS REBOOTED.
Microsoft has this down as Winsock2 corruption, but I’ve no idea what the real cause is.
Once this command was issued and the machine was rebooted everything was fixed, including the event viewer.
Error 1747 : The Authentication Service is Unknown
22 Responses to Error 1747 : The Authentication Service is Unknown
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Jo says:
Brilliant – it worked perfectly. Wish I had found this site 5 hours ago!
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davem says:
Worked great upon reboot. Thanks.
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DRAX6 says:
Massive thank you It worked!
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iHateVista says:
Incredible… that was awesome! Thanks for the help!
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XStylus says:
Worked great! Thanks!
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Haluz says:
super, thank you. Fortunately I have read this post before reinstalling OS
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Mike says:
You are Awesome!!! I tried everything i could think of and I am pretty good with a computer. Thanks!!!
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David says:
Worked a treat, many thanks
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Khaled says:
Thank you… Worked! but from the first time I ran winsock command it was sucessful. Restarted and now back to bussiness, thanks again and keep the good work
Khaled
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Gene says:
It works! WOW! That’s on XP Home as well. Thank you (Dankie)!
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natedogg says:
Thank you. Yes. This cmdline did fix it.
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Thank you so much. This did fix my p.o.s. vista problem.
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Valentin says:
Thanks!
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Stan says:
Thanks. Worked like a charm.
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This fix weorked on a Windows 7 32 bit error issue. Whoo Hooo!
Thanks! Blessings to you!!
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Chris Locke says:
Thanks for the detailed instructions. Seems to have fixed a rogue laptop in our offices.
\o/Thanks!
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Eddie Kadet says:
SUPERB!! PERFECT!! thank you!
Thanks, you fixed my PC!