The 250 GB secondary hard drive on my Dell Dimension 4700 took a dump and I replaced it with a WD advanced format 800gb green drive. While the new drive shows up under my computer and I can access it, every boot-up brings up the "New Hardware Found Wizard" and it tries unsuccessfully to find the driver for the drive. Numerous calls to WD have brought no solution. I've ran the recommended WD Align utility, and it reports everything OK. BIOS updated via Dell Website. Any suggestions?