After installing KB4464330 (build 17763.55) my HP EliteDesk 800 G3 the machine refuses to boot, ending with BSOD WPF_VIOLATION.
I was able to get the PC working again using an earlier restore point.
It seems that this problem at least HP machines:
https://www.bleepingcomputer.com/news/microsoft/windows-10-kb4464330-kb4462919-and-kb4462918-cumulative-updates-released/
I contacted MS support and was told that: