Catastrophic failure (0x8000ffff) when trying to install .net framework 3.5

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MohamedHafiz249

Hello, I am stuck on build 1803, I recently downloaded an app which requires .net framework to be installed, I haven't it installed so when launching the app a (an app on your pc need .net framework) window appears, when clicking the download and install button an error code of 0x8000ffff with the message (this feature couldn't be installed - catastrophic failure) appears.


I have tried to do dism /online /cleanup-image /restorehealth but after it reaches 100% it shows that the operation didn't complete successfully with the same error code as before, I also have .net on demand so I tried to install it via dism but again the same error code comes out with the message (DISM failed. No operation was performed.), and when trying to use sfc /scannow a message of (There is a system repair pending which requires reboot to complete. Restart Windows and run sfc again.), when restarting windows it seems like it works on updates or something like that with message (getting things ready, don't turn off your computer) then the system restarts and when it starts again it shows the message (We couldn't complete the updates undoing changes) and starts on the same situation as before, the dism and sfc shows same messages


Also my windows sometimes saying that we are adding some features but after couple of minutes it says something happened we are not able to add the feature.


I even has an ISO image of windows 10 build 2004, I tried to update with it, but when it reaches 82% the system restarts, when it starts again it continues on the updates, but suddenly it restarts and shows (undoing changes made to your pc) and starts to the old version again.


I want to install .net, preferably without doing a complete update to the system.

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