Offizieller Kommentar
@Fran > There are a couple of reasons the driver install may fail; one is that your computer doesn't have the appropriate service packs, another is that your user does not have administrative privileges. As @Marcel points out, it could also be due to a conflict or even a defective installation package.
Please check those items first, and be sure to right-click and "Run as Administrator" when you install the drivers.