SBSP-Windows10_1709 update fails to install with exit code 1.
The cl5.log file for the installation sandbox folder will contain the error 1623 (ERROR_INSTALL_LANGUAGE_UNSUPPORTED).
If the cl5.log contains error -1047526904, then the computer may contain incompatible software with the OS version you are trying to install.
The issue occurs when the installation media (ex. Windows10x64Professional1703-ENU.iso) language does not match the OS install language.
1. Installation Media Language: "%volume%:\sources\lang.ini"
2. OS install language: HKLM\SYSTEM\CurrentControlSet\Control\Nls\Language
Patch Management Solution 8.1
Make sure that the installation media language matches the OS install language.
a. Download new ISO file from Microsoft if needed.
b. Place it into the update package folder.
c. Run the NS.Package Refresh scheduled task on the Symantec Management Platform Server.