Hello, Don Canfield.
Here is a link to download the installation package of drivers and firmware for Surface Studio (1st generation): https://www.microsoft.com/en-us/download/details.aspx?id=54311
Link source - Microsoft Help: https://support.microsoft.com/en-us/surface/download-drivers-and-firmware-for-surface-09bb2e09-2a4b-cb69-0951-078a7739e120 (the "Manually update Surface drivers and firmware" section)