Well, it's something bad yes and can potentially damage your hardware. Can you do something about it? Possibly, there are many things that could cause such behavior, including

Perhaps check your memory e.g. by booting off a Trisquel live media and selected mem check. Are your PCI cards and RAM firmly seated? Does your box overheat, is there a lot of dust and do the fans work? Dust can cause strange effects besides overheating too. Are you getting clean power from your sockets? If not, a UPS unit might help. Or your motherboard might be dying, inspect visually the capacitors. And so on and so forth...

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