After such a long time, my pc works well again. Well, of course it's a good thing, maybe we can say it's a wonderful thing. But the point is that i just reported the problem to my teacher. And he is so kind that he called the service center right now. I remember clearly what happened a month ago, when the sevice man came herem, my pc worked well as before against nature. So he did nothing and went back, and i felt so sorry. However, the same thing happened again in me. How can he trust me next time, of course i hope there won't be next time.
I feel so boring. After all, it's a good thing.