sorry for the late reply, after a week of searching for updates/isos, I was able to replace all the corrupted files.
I tried running sfc /scannow but it fails saying "windows resource could not perform the requested operation". I am now trying to install KB4534310 manually since my test machine cannot be connected to internet.
I seems to be stuck in a loop according to CBS logs but it's still running so I will give it a chance and run it until tomorrow then provide the needed logs.
The update install for KB4534310 is not going anywhere (I even tried setting TrustedInstaller service to automatic) so I am just going to upload the latest CBS logs. Appreciate it if you can show me what I missed in the logs, thank you!
It looks to me as if the update is failing because there is another package required which can't be installed because there is no connection to the internet when you are running the DISM command.
The Package will need to be installed offline first.
Package_for_RollupFix~31bf3856ad364e35~amd64~~7601.24544.1.9
It looks like an even earlier KB update needs installing as well. Try installing the KB4012215 update using DISM. Are you OK with doing this or do you need instructions?
If it is successful you can then try adding the other updates again.