Windows 10: I can't install .NET Framework 3.5, error code 0x80073712

Not sure if anyone else got this error code, but it's not on that Microsoft Learn article about solving installation problems for .NET Framework 3.5. The error code that I got is 0x80073712. The OS that I'm using is Windows 10. It happens literally every time I try to instal .NET Framework 3.5. Help me!

:)

 

Unable to download any framework for .net - (error code 0x80070002)

OK, the Windows 10 Feature installation method should have been straightforward, but since that errored out as well, something else seems to be going on with your Windows, so wait for somebody with more experience to suggest a way out.

In the mean time, if you haven't already, you could give muchomurka's suggestion a go as well with the elevated prompt and an install media to see if it works. The following link shows the detailed steps involved.

Offline install of .NET Framework 3.5 in Windows 10 using DISM

 

Win10 Unable to install .NET Framework 3.5

Just switched to Win 10 from Win 8.1. A program is giving an error at startup (C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorlib.tlb could not be loaded)
so I tried to reinstall .NET Framework.

I've tried with all the possibilities I've found and even installing some components that indirectly install it but alway it ends with:

I've spent a lot of time searching possibilities, let's see if anyone has a clue or an undesired revert to Win8.1 is on the horizon...

UPDATE:
From the suggestion in a comment by @magicandre1981: Can't install .net 3.5 on Windows 10

Pointing to: Adding features (including .NET 3.5) to Windows 10

I executed:

And it worked! 100% completed without problems. Now almost all is fixed except when I try to open a Properties window on Visual Studio 2008 (the main user of the .NET 3 it says

Haven't dug deeper but I hope to fix this -hopefully- last one.

 

Install .NET 3.5 Framework on Windows 10

Is it even possible, the help for this is of no use.

.NET Framework 3.5 installation errors - Windows Client

This is the bit thats applicable to me.

To fix the error codes for Windows 10, follow these steps:

1. Download the Windows Media Creation tool, and create an ISO image locally, or create an image for the version of Windows that you have installed.
   
2. Configure the Group Policy as in Method 2, but also follow these steps:
   1. Mount the ISO image that's created in step 1.
   2. Point the "Alternate source file path" to the ISO sources\sxs folder from the ISO.
   3. Run the gpupdate /force command.
   4. Add the .Net framework feature.

Method 2 isn't mentioned anywhere.

Further more if i download the framework installer and run the dotnetfx35setup.exe file i get a window that says it requires the framework its trying to install, so its a loop that requires the framework to install the framework.

Next issue is that if i try to turn it on from Programs and Features in the control panel it throws me back to the initial error of not being able to install it which takes me back to the link above and method for fixing it which doesn't include the information
for Method 2.

I'm starting to think MS are purposely making it uninstallable at this point.

Any help would be much apreciated.