Domain PC's freeze up same time (approximately) every day

Microsoft Windows server 2003 r2 standar...
October 24, 2012 at 09:40:54
Specs: XP Pro, 2003R2, varies
This is a small business network issue specifically with some of the connected PCs. Last year they had their Win 2003 server fail (drive fail-over problem with OS) and it had to be re-installed with Win 2003R2 server (per Microsoft Techs). Since then 2 of their 5 connected PCs have had this problem of freeze up ~4:30 - 5:00; not every day, but most. Now there is a 3rd PC being affected.

Additional facts:

- A proactive reboot can often preempt the happening.

- The "freeze up" seems to be from a disconnect of network drives during the passing of data. There are homegrown databases in use.

- Other PC's using the same local 10/100 switch and SOHO router do not exhibit the problem.

- I thought I might have fixed the problem when I found that all of these PCs and the server all still had the time server set to (which is no longer supported) and changed to a government time server. This stopped some random freeze ups earlier in the day which had confused the 4:30 issue, but did not solve both.

I have obviously combed through many log files on both local PCs and the server, but have yet to find a cause.

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October 24, 2012 at 13:28:02
Could it be that as businesses start shutting down towards the end of the working day there is a power surge? There could be a variation in the sensitivity to this across computers which has so far only manifested itself on 3 out of 5. It might be pure coincidence that this trouble has arisen since the Win 2003R2 server was re-installed.

Clearly the above is nothing more than an inspired guess, so watch this space for other ideas.

Always pop back and let us know the outcome - thanks

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October 24, 2012 at 13:42:08
Derek, all suggestions are welcome.

This is unlikely as it is a freestanding building. I have already tried changing cat5 cables, ethernet ports, IP addressing (static vs dynamic), so I will look for any power consumption changes that might be lurking.

I have seen this problem posted in other forums in one form or another. Many are older posts, but often it comes back to Server 2003. And often the discussion is turned toward DNS or NTP. I have verified that both of these are set up correctly, but there can always be a surprise factor. One other discussion focused in on IIS on 2003 server.

The problem for me is that each discussion has ended without revealing a clear solution.


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October 25, 2012 at 19:06:03
Are any scheduled tasks running that may consume resources? Is the server or individual pc's have scheduled tasks or antivirus scans running etc?

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