I have an old laptop its a lenovo 3000 n200 runing xp. it shutdown fine but now it shuts its self off on the windows sign during boot, i then get the unexpected shutdown message. it wont restart in any mode, and there was no new hardware or software changes, Any body seen this before ?
How many memory sticks does it have ? If more than one, try booting with only one, as it might be a memory failure