HP DV9000 Laptop, replacement HDD, Seagate Momentus 100Gb. BIOS not sophisticated enough to see if Drive recognised, but it does pass the HDD Diagnostic Tests. When trying to install Vista, no drive detected at the 'Where do you want to install Wndows?' screen. Booted the laptop from a USB drive into Ubuntu, detected the HDD OK. Used the Vista Install disk to get to CMD prompt, was able to format drive NTFS successfully. Wondered if Vista needed Drivers, (shouldn't!) couldn't find any on Seagate site. Stumped!