Sorry to hear you're having problems too but at least now I know it's not just me. If I find a solution I'll let you know!
The update is now a proper one and not optional but still errors for me with 0x800f081f.
MS support game some things to try (mainly force .net 3.5 install) but had already so sadly did nothing.
Computer Type: PC/Desktop System Manufacturer/Model Number: Own built OS: Windows 10 x64 CPU: Intel i7-6700k Motherboard: Asus Z170 Pro Gaming Memory: 16gb (8GB x2) Corsair DDR4 3000 Graphics Card: ASUS ROG STRIX GTX 1080 Ti GAMING OC Sound Card: Fiio USB DAC Monitor(s) Displays: 2x 27" Benq XL2720Z Screen Resolution: 1920*1080 Keyboard: Fnatic Streak Mouse: Razer DeathAdder Elite PSU: Corsair TX650 Case: Lian Li PC-V1000 Cooling: Noctua NH-U14S U-Series CPU Cooler Hard Drives: 1xSamsung SSD 840 Evo 250GB
1xSamsung SSD 850 Evo 800GB
1xSeagate ST3000D 3TB Internet Speed: 75Mbps Down | 20Mbps Up Browser: Google Chrome Antivirus: Eset Antivirus
UPDATE 11/12: KB4524570 CU Windows 10 v1903 build 18362.476 & v1909 build 18363.476
UPDATE 10/23:
Today, we have released an updated Cumulative Update KB4522355 version which applies to both 19H1 and 19H2.
(v1903) Windows Insiders in...
UPDATE 10/21: Getting the Windows 10 November 2019 Update Ready for Release
Source: Testing the throttled delivery approach for 19H2 | Windows Experience Blog
Direct download links for KB4517389 MSU file from Microsoft Update Catalog:
UPDATE 10/8: KB4517389 Windows 10 Build 18362.418 19H1 and 18363.418 19H2 - Oct. 8
Source: Testing the throttled delivery approach for 19H2 | Windows Experience Blog
Direct download links for KB4524147 MSU file from Microsoft Update...