New
#1
You can 'read all abart it' in the News item here:
Cumulative Update KB4489899 Windows 10 v1809 Build 17763.379 - Mar. 12 Windows Update - Windows 10 Forums
Seems ok for most I think..
80070005
Fix Windows Update Install error 0x80070005
Try
Reset Windows Update in Windows 10 | Tutorials
so far no problems with KB4489899. I did not even encounter the potential problems with Realtek HD Audio Manager and the KB4489899 update on a friend's ASUS motherboard using Realtek ALC887 audio (and latest available FFxx HDA drivers)