Finally, there's hope for my pc. I'm not really sure about the problem (although I believe it has to do with the adapter setting) but it's definitely not about the BIOS.
I've just came back to uni to get more info on the OS setup and by tonight I'll be able to get the pc to start working again. Phew, instead of spending at least RM80 to get people to fix it for you, better do it yourself. You're not only get to keep the cash but you really learn a lot through the process.
