Which Operating System are you using?
How much free space is on your hard drive?
XP Pro and PLENTY of free hard drive space.
But it now seems that McAfee was innocent here (though I have uninstalled/reinstalled McAfee and other security software to solve a variety of weird behaviors over time). Merely rebooting the machine takes care of the problem -- again, at least temporarily. Since the McAfee uninstall involved a reboot (and perhaps the install does also), the McAfee maneuver only coincidentally solved the problem.
So we have an easy workaround when the problem appears, but still a mystery as to the cause. Doesn't seem to be a power management problem either. The machine was still good this morning after running overnight.
So thanks anyway, but this seems to be no longer the right forum to pursue the issue!
Could it be waking from sleep or hibernate?
A good thought, but as I noted, it really doesn't seem to be a power management problem either. The machine was still good the next morning after running it overnight.