Stop BusyBox Command Line for Loading on Start Up

My computer turned itself off to protect itself from a power-surge. This has happened before many times, with nothing weird happening the next time I turned on the computer. I would press the power button, wait a minute, enter my password, and then be right back at my Desktop. This time however, something different happened. When I press the power button, I am taken to the BusyBox command line. To be completely honest, I am way out of my depth. My only guess for what is happening is that before there was a file that BusyBox automatically ran when the command line was opened upon start-up, and now it does not. This seems pretty absurd to me though because the problem started after a power-surge, which primarily affects hardware, so the software should be fine. Even if this is what happened, I have no idea what file is suppose to be run, where in the directory it would be located, or the syntax that BusyBox uses.