Hello, I am trying to install Windows 7 Professional onto a computer from an 8GB USB drive. I can boot from the USB fine but when it asks you choose where you want to install Windows it can't find any drives and it says I must load a driver. This is strange because if I put the hard drive into another computer it will install Windows perfectly. I can see the HDD in the BIOS but it just can't see it when installing Windows. I have a Western Digital 320GB HDD. Any ideas what's wrong, or perhaps where I can get a driver for it? I have looked on the WD website but couldn't find anything. Thanks, Impossible.