I found this on a windows forum:
Code:
"Hi, i also had this problem but managed to fix it.
This required me use an external hardrive I had. I extracted the .iso file to an empty partation (so inside the partition it would look like the inside of a boot disk). I then ran the setup file while I was still logged into Vista, and choose custom instal to format the whole drive. The first step which is "copying windows files" or something like that takes alot longer than if u did it from boot up. My laptop restarted when it got to the "expanding windows files" (where it got stuck before), and when it restarts you have given 2 options to select before your computer starts. Windows setup, and Windows Vista. Highlight Windows setup (or just press enter becuase it will already be highlighted) and it will give you screens like it did when you booted from a DVD, but it will continue straight from "expanding windows files". From this point I encountered no errors or problems, but it is time consuming.
However, make sure you extract the ISO file to a hardrive or a flash pen or something, this procdure does not work if your run from the disk, I dont know why, but for me i tried to use the setup from the disk, but it got stuck during the "copying stage" right at the start. So if your encountering these problems, just copy the contents of the CD into a harddrive of some sort, and then run it, dont boot. "
If you've already sued the install disk on other builds, try cleaning it. Might also check out
Microsoft Store Online