I've extensively searched the internet for the answer to my problem and tried everything I could find. I have a Dell Inspiron 1545 laptop. The hard drive went bad, so I replaced it. When I tried to install Vista from the Dell reinstallation DVD I got an error message saying the files couldn't be copied. I thought maybe the optical drive was bad, so I used WinToFlash to create a bootable flash drive and I can't even get as far along as I did before. I get the error message 0x80070070. The hard drive is good (ran the diagnostic disk that came from Dell). I honestly don't know what the problem is. I also tried installing Windows 7 from a Dell disk that came with another computer just to see if my original Vista disk is bad. That would not install either and I got the same type of error message. Do you have any advice to offer -- hopefully nothing too complicated or I will have to take it to a real tech person. Side note: the old hard drive was making a noise before it died. The new one is making the same noise.