https://forums.mydigitallife.net/threads/windows-10-hotfix-repository.57050/page-105#post-1216064 https://forums.mydigitallife.net/threads/abbodi1406s-batch-scripts-repo.74197/
Download the cab, download and extract this script: https://forums.mydigitallife.net/threads/windows-10-hotfix-repository.57050/page-105#post-1216064 and put the cab next to the .cmd and run the script.
Open ISO with winrar or 7zip (or mount) and go to "Sources\sxs" and extract "microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~x86~~.cab" or "microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~x64~~.cab".
On Admin CMD, go: DISM.exe /online /Enable-Feature /FeatureName:netfx3 /Source:X:\sources\sxs Replace X with your image drive