I have my new PC built up. I turned it on and went through the BIOS and CMOS and stuff. I have the Power Cable Connected to my SATA HDD but the computer still won't recognize it. I need help with that. Also, what do I do after this? What steps do I take? When should I start installing the OS? Sorry, this is my first time building a PC from scratch. I just want to learn all this now so that I don't have to go through all of it later.