Okay, first off, I'm really sorry for this late update. For this issue, I just found out that when me and my father were applying thermal paste for my CPU, he screwed the fan too much that it won't spin, causing my CPU to overheat and resulting a shutdown, but still, I wont go far to this PSU thing. I still have something for my PSU.
I have suspected that the grinding noise when cold boot in my PC was my PSU fan, it's been there for months already. I'm planning to change my PSU for the same one and use it for only a month because I also use my computer to work. Unfortunately, my cheque's still next month, possibly until January. Is it fine to use the same generic brand for at least a month until I can afford a better one?