I don’t know what the reason can be but until notebook works properly don’t care about anything.
Sometimes strange things happen with notebooks.
One time my notebook was “blocked” somehow. It has never happen again and until now I cannot explain what the problem was.
If the same will happen again and again then you can be worried and maybe ask Toshiba for help.
If this happened only once don’t care about this problem. As Macius wrote, sometimes such strange things happen with computers but it’s not always possible to say what the problem is because it could be everything.
If your notebook runs properly now, enjoy it and have fun.