|BIOS' cannot automatically update themselves AND you would (or should) NOT want them to. A BIOS should ONLY be updated to solve a particular problem and then only if the solution to that particular problem is listed in the update's description or in order to use newer hardware (like a CPU) that is only supported with the newer BIOS.|
Updating a BIOS can be hazardous and once it starts it must complete. If it is interrupted then you may not ever be able to complete it or use the machine ever again (sometimes they can be started over, but do not count on it).
That said, the other problem sounds like you had a shut down/restart possibly due to overheating (the increase in the fan speed is the clue here). Blow dust out of your vents with a can of compressed air to maintain the cooling efficiency of your system and NEVER use the laptop on a soft surface (bed,couch, lap, etc.) since it blocks the air flow through the bottom vents. Install Speedfan or HWMonitor to monitor your internal temperatures and see if you are having a problem.
You have to be a little bit crazy to keep you from going insane.