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W32Time Error 27 in Single Windows XP SP3 Client

Posted on 2010-11-16
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Last Modified: 2012-05-10
Hello Experts,
I've had a problem with NTP / w32time for months now on 1 client (out of 500+, so I know the server and network is OK).  

This PC sometimes looses it's time setting all together (i.e moves to 1/1/93 or something), but mostly just outright has difficulty with NTP. I notice the communication problems in the Windows Event Logs. Example for today: over 300 of the error below in the Event/System logs.

Error 27
Source: W32Time
Time Provider NtpClient: The response received from domain controller DC.domain.int is
missing the signature. The response may have been tampered with and will be ignored.

In the past, I've tried a variety of things including virus scanning, hardware diagnostics (HDD, RAM, etc). I'm sure I ran CHKDSK and SFC, but can't really remember exactly everything which was run. I know the problem never really went away. The user has just ignored it.

Anyone more familiar with Windows XP w32tm and NTP to maybe give me some pointers for this one client?

Thanks for your time!
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Question by:ottobock
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by:ottobock
ID: 34148834
Also, I'm sort of looking for direct troubleshooting steps to try instead of
"Here is a Microsoft Technet Article on w32Time ~ read it."
:-) Thanks!
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Expert Comment

by:Darius Ghassem
ID: 34148947
Run w32tm /resync /rediscover
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by:ottobock
ID: 34149516
Strange... Ran the command, and there is no update yet in the event logs (whether it synced or error...) Still checking.
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Expert Comment

by:Darius Ghassem
ID: 34149588
If the command ran successfully then it sync properly
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by:ottobock
ID: 34149695
Same error. :-(
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Expert Comment

by:Darius Ghassem
ID: 34149960
w32tm /monitor
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by:ottobock
ID: 34167522
OK - I ran the w32tm /monitor, and it returned a list of all the NTP servers in our Domain. I then re-ran w32tm /resync /rediscover and it stated the registration was successful. No errors since, but continuing to monitor. Thanks!
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by:ottobock
ID: 34189005
Still the same error. I have a feeling there is some corruption deep down, or maybe a strange hardware issue on this PC. This weekend, I ran SFC /scannow and CHKDSK /r, and the errors still occur...
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Expert Comment

by:Darius Ghassem
ID: 34189073
Disable any AV
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by:ottobock
ID: 34282823
Still no help... I'm thinking this is caused by a bad OS installation, or possibly bad HW. Thanks anyway for your ideas!
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Darius Ghassem earned 500 total points
ID: 34283369
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by:ottobock
ID: 34294576
OK - I tried the trick from the first link, specifically,

***************
Brent Knight
I got this error on a single WinXP machine on my network. All the other workstations were running W32Time without major problems. The only difference was that this was my own workstation and I had tried to configure the W32tm application manually.
To fix it, I unregistered the service (removing it from the system and the registry) using the command "w32tm /unregister" then restarted the machine. Run "w32tm /register" after reboot and check the service state (should be set to automatic, but start manually if necessary).
This does not get to the root of the problem (probably some misconfiguration of W32tm), but so far I've had no more problems.
***************

After the Unregister/restart, the time/date was way off, and then after the register/query, the time did sync correctly. Now I'll monitor it for a few days.

Thanks!
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