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Were you running McAfee antivirus software? If so, there’s a thread posted on that, very recently here on FR, some sort of malicious code in it that causes an “autoimmune” attack, wiping out core files. Some networks in England and Italy are experiencing 50% BSOD.
Unplug the power cord, remove the battery. Wait about 5-10 minutes, re-install battery, plug in the power cord and turn it on.