How can i repair my old computer?

first my computer has a video card that doesn't work.

i broke the part to fit the intel cooler.It is a p4s8x-x, so there is 4 hooks on the intel fan that fits in the motherbroad.( i broke one of those on the motherbroad)

Also the last time i used it, it shut down by itself beacuse it overheats.

i also want to put more harddrives in it.

how do i fix all this problems?|||that sonnecter on the motherboard is for the fan, for the processor, if thta doesnt function, it will overheat, and shut down, so you could buy a special adapter, for the fan, but if not, your screwed|||I would suggest getting a new computer. I know this may be a bit out of the question, but if you've broken one of those hooks, its not looking great. The computer's overheating problem is also non-repairable so maybe buying a new desktop with Windows 7 on it is the answer.