Hello, Michael Showalter1
Welcome to the Microsoft Community.
Hello, you can check your purchase of the product is to buy a list of equipment, if there is no usb adapter, then this keyboard should not need a usb adapter to connect can be used directly with bluetooth connectivity, if this list does have a usb adapter, but you did not receive, then you can contact your purchase of merchants after-sales consulting to contact them for you to make up for the distribution of accessories, in addition to What do you need the driver for, as far as I know this product can be used directly when connecting to the computer, what problems did you encounter when using it, you can tell us.
Best wishes
Bobhe | Microsoft Community Support Specialist