I bought a Lenovo Thinkpad E585. Updated it with the Windows 10 October update (I bought the thing in December). Didn’t boot for the entire day and had to re-install the update. I lost a whole day of work. If you encounter this problem and you don’t want to spend the entire day worrying about how much it will cost, just open the backplate and make sure that the fan cable is in securely. I don’t hate Lenovo after this but I will never buy one of these again.