A disk died in one of my machines, (quad core), so I installed a new one, (SSD), and loaded the machine with Windows 8, (most of my machines run XP). Twice now, when returning to the machine in the morning, the manager task is frozen, nothing changing at all. Task manager shows four science apps running fine. I kill and restart the manager everything looks normal again. The portfolio on that machine is SIMAP, Einstein, Rosetta and POGS, but I doubt that is relevant. Machine runs 24/7.

Obviously, this is not a serious problem, but it might bother some.

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Wave upon wave of demented avengers march cheerfully out of obscurity into the dream.

You might try going to 8.1 as this cleaned a lot of problems I was having with 8.0. One of the problems was machine freezing. I don't have any problems running 8.1 and I believe it has nothing to do with boinc.

A disk died in one of my machines, (quad core), so I installed a new one, (SSD), and loaded the machine with Windows 8, (most of my machines run XP). Twice now, when returning to the machine in the morning, the manager task is frozen, nothing changing at all. Task manager shows four science apps running fine. I kill and restart the manager everything looks normal again. The portfolio on that machine is SIMAP, Einstein, Rosetta and POGS, but I doubt that is relevant. Machine runs 24/7.

Obviously, this is not a serious problem, but it might bother some.

Since I have rebuild most of my pc's to SSD's I have some experience with that.
Three systems had similar problems, not only with BOINC. One machine had boot problems, another machine crashed once in 2 weeks, a third one randomly without any visible pattern.

In all cases a firmware upgrade solved this problem. It was on my Samsung Evo, on a OCZ and also on the third one (cannot remember which brand). I would start looking for firmware updates.

Alexander