I have a Compaq Presario CQ70, and I think the harddrive has gone bad because the laptop no longer recognizes it in the bios. I was going to get a new hard drive, but I am told I need to install drivers for the laptop and I am a little unsure how to go about this. Can someone please tell me what drivers I will need and do i install these drivers after installing an OS or before it? Better still give me the link to the drivers I will need. Thankyou!!