Windows 10: Error 0x0800736b3 when installing .net framework 3.5

Hello everyone how are you doing? So I got the cumulative update KB5001028 for windows 10. Tried installing it but got error 0x800f081f, which I read is caused by a faulty .net framework 3.5 installation. I tried downloading both online and offline installed from microsoft support but when I run any of them nothing happens and not even a new process starts in the task manager. I tried installing 3.5 using programs and features and choosing the Turn windows features on or off, but when I try to disable 4.6 or 3.5(which are already enabled although they don't seem to work as they are casuing the update not to install), I get the 0x800736b3 The referenced assembly is not installed on your system.

I tried some solutions to see if it will fix it but none seemed to work, here is what I tried these commands on adminstrator run CP:

• DISM /online /enable-feature /featurename:NetFx3 /Source:F:\sources\sxs /all /LimitAccess

Where F is the virtual drive where I mounted the Win10 installion ISO, Trying that command gives 100% and The operation completed successfully. but I still get the windows update error.

• DISM /Online /Cleanup-Image /ScanHealth and DISM /Online /Cleanup-Image /RestoreHealth

Both fail due to error 2 The system cannot find the file specified.

So what else can I try to fix this problem? It has been bugging me for quite some time now and I can't find a way to fix it.

Sorry for my bad English.

submitted by /u/Amir3022
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:)

 

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

 

.NET Framework 3.5 installation error: 0x800736B3

Hi,

Welcome to Microsoft Community and thank you for your interest in Windows 10.

I suggest you to follow the below steps to check whether the .NET Framework 3.5 has been installed or not.

• Press Windows+X and then select programs and features.
• On the left hand side click on the option “turn windows features on or off”.
• Check whether the “.NET Framework 3.5” has been checked or not.
• If not check then I suggest you to check it and then install it.

Hope this information was helpful and do let us know if you need further assistance. We will be glad to assist.

 

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.