Windows 10 updates fail to install

All cumulative updates & feature updates fail to install.
Windows 10 v1803 build 17134.191. I have run sfc scannow and DISM and they report no corrupt files.

Some of the error codes are KB4480966 0x800736b3 KB4483234 0x800736b3 & KB4023057 0x80070643.

Under "turn on apps & features" .net framework 3.5 is installed showing a black box not a check mark.

These updates and more have been failing for about six months. I need help finding a solution.

If you really want to fix things, you can try a "repair install"

This is 'updating' your machine to the same OS, and refreshes all the files that SFC and DISM usually miss. I've fixed several weird windows bugs with this method where all else failed.

1. Create a windows 10 iso with the win 10 installation tool.
2. Mount the iso
3. Run setup.exe
4. Install as normal, Making sure to check "Keep personal files, apps, and Windows settings"