I own Intel NUCBEH8i7 with Windows 10 64b.
Removed DSA with suggested uninstaller application and can not install it again.
The steps I'm performing:
If cancel is clicked - then I get "0x800070643: Unknown issue with installation." error.
Thanks. Updating to 1903 and will provide an update.
I did two things here and I'm not sure which one had impact.
After reboot DSA was successfully installed.