Typed CMD in the "Type here to search" box on the Windows 10 screen. Then right clicked run as administrator. Then in the CMD window, did cd command to get to the download directory.
That worked once I figured out where the download was and the Toad filename. I changed (cd) over to the directory and gave the command:
msiexec/i "ToadforSAP_4.0.4.45.x64.msi"
Thanks much!