SecureAuth Versions Affected: ALL
The installer will download and license file will download but the installer stalls afterwards.
After downloading the license and certificate, the installer will try and download the secureauth.zip file. If you already downloaded the SecureAuth.zip file and placed it in D:\MFCApp_Bin\SISU\Download (see https://support.secureauth.com/hc/en-us/articles/360019885211-SecureAuth-Installation-Setup-Utility-Could-Not-Download-Files for more information), the installer will error out because the file it is trying to download has already been downloaded and placed in the directory it wants to drop it off in.
Instead of trying to reset the activation key and trying to re-run the SISU once again, just simply rerun the SISU after it fails and it will complete on the 2nd attempt.