Run the memory test that comes with windows. It takes like an hour or something, and will tell you if the memory is malfunctioning - that would explain all the

Run the memory test that comes with windows. It takes like an hour or something, and will tell you if the memory is malfunctioning - that would explain all the mysterious crashes. I've had this problem out of nowhere one day (computer would not stop crashing randomly) and it turned out to be a defective memory stick. All good after replacing it.