New
#1
Direct download link for KB4073291 MSU file from Microsoft Update Catalog:
Download KB4073291 MSU for Windows 10 v1709 21-bit (x86) - 330.3 MB
For 64-bit Windows 10 v1709, see: Cumulative Update KB4073290 Windows 10 v1709 Build 16299.194 - 64-bit - Windows 10 Forums
21-bit????