Log file errors 1711 & 1603
SOLUTION: Right-Click in the installer and choose Run as Admin.
HOW TO GET THE LOG FILE:
After SN8 installation fails, go to C:\Users\YourUserName\AppData\Local\Temp\ and sort by date. Grab the most recent log file. The log filename looks like MSIXX123.LOG.
Submit the error log in a ticket request for assistance.
Can't find the recent log file, please see here: