My sister's laptop had the hard drive go bad so I replaced it. I now cannot get windows to install on the new hard drive. I have installed windows many times before but this HP Pavilion dv5000 just won't take windows. I have a couple of windows installation disks just not the one that came with this laptop. I have been able to install before like this and use the numbers off the sticker but after formatting I get a message saying that this is not a genuine windows disk and it will not install any further. My best install disk is for Dell, so I can't use it. I really don't know what to do. I have always had problems with HP's. I have to fix it for her, I don't have a choice. Any suggestions are very welcome. It came with Windows XP Media Center Edition 2005. I downloaded a bootable iso version of this but it was a cracked version and didn't ask for the serial numbers. I have legitimate serial numbers.