Server locks up then comes back

I have a SBS 2k3 HP Proliant P4 2GB, 36GB SCSI no RAID. about 5 users so traffic is pretty low.

At seemingly random times access to the server will stop, the odd thing is that connections are not broken, if you are VPNed in you stay VPNed in, your documents don't crash etc...

It might do this 1 or 10 times a day and for 1 or 10 minutes. Server has veritas SB and Norton coporate.

I suspect a hardware error as the server itself freezes (you can't log on or type) during these episodes...

Any ideas?
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networkfishAsked:
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jhanceCommented:
I also would be suspecting a hardware problem.

Check you server logs for any hardware related events.  In particular I've seen such behavior with a failing hard drive.  It's not bad enough (yet) to report the error to Windows so nothing shows up, but the drive is retrying like crazy and is eventually recovering the data.

If you are near the system when this happens you can usually hear the characteristic clicking sound that this causes.
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