server has been rebooted, chkdsk is fine, no virus or trojan. Appears to happen every 12 hours, so I suspect it might be something with one of the secondary domains.
What I'm really interested in is the RtlIsValidIndexHandle error and what that might point to.
I'm a firm believer in "if it ain't broke, don't fix it" which is one of the many reasons I haven't attempted to upgrade the server. The whole setup is rather complex, as most things are, and everything hangs on a thread.
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