Can't enable .NET Environment in Windows 10 1903

As I said on my previous reply, no issues for me.

I don't know what it is but there must be something else causing the failure.

This a fresh install of Build 18362.175 (x64) to SSD using the current ISO available from MCT.

As you can see, .NET 4.8 was installed properly and .NET 3.5 was successfully installed via PS.

In the second DISM command, the one with /Source, you need to have the ISO mounted to some drive letter.  If you connect your USB drive containing the Version 1903 upgrade, you need to refer to whatever drive letter it has, not to "E:" (unless it happens to be in drive E:).

That should enable you to install the latest .NET Cumulative Update.  However, there is now a new version, KB4502584, which you can download from the link below.  Be sure to get the right one to match your system.

https://www.catalog.update.microsoft.com/Search.aspx?q=4502584

I have tried many things to fix the error.  If your system is in the same error state, it will show an unusual mix of Optional Features (as in your screenshot) when you run optionalfeatures.exe.  The method that I described above is the only way that I have found to repair it without upgrading to a "20H1" Insider build, which will not evolve to become a public version until around April - May of 2020.

I have not seen the issue either, unless I force it to happen, but I know that for some it apparently happens just by allowing some Cumulative Update to install.  The fact that PowerShell does not work is an indication that you have the same problem as is so difficult to resolve.

Yes, I tried the command with the /Source parameter while the usb drive created by media creation tool is inserted.

And yes, the drive has the letter E: :)

The error message for the command "DISM /Online /Add-Capability /CapabilityName:NetFx3~~~~ /Source:E:\Sources\sxs" was something like "Could not find correct assembly" I think :/

I am sure that this usb drive is the same I used a month ago. Should I create a new installation usb drive?

I think the USB is probably fine, as you used it to install Windows.  E:\sources\sxs should have 4 files:

F:\sources\sxs>dir /b

Microsoft-Windows-InternetExplorer-Optional-Package~31bf3856ad364e35~amd64~en-US~.cab

Microsoft-Windows-NetFx3-OnDemand-Package~31bf3856ad364e35~amd64~en-US~.cab

microsoft-windows-internetexplorer-optional-package~31bf3856ad364e35~amd64~~.cab

microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab

You can check the status of the NetFx3~~~~ capability:

DISM /Online /Get-CapabilityInfo /CapabilityName:NetFx3~~~~

You can also try adding NetFx3 with the enable feature command, but this usually fails:

DISM /Online /Enable-Feature /All /FeatureName:NetFx3 /Source:E:\Sources\sxs

Another way is by adding the .cab files as packages:

DISM /Online /Add-Package /PackagePath:E:\Sources\sxs

Don,

Thanks for all of your help on this thread. I followed your suggestion in the previous post, and it's still not working for me.

I have Windows 10 Pro, 1903, Build 18362.267.

• Uninstalled KB4495620 successfully
• Ran the DISM command with Windows ISO in a flash drive successfully
• Installed KB4502584 successfully

Tried running the DISM command and received an error 50 saying that Microsoft-Windows-FetFx3-OC-Package could not be enabled. Once I checked optionalfeatures.exe, I saw that the "abnormal" list was not fixed.

I have the following updates on my PC:

• KB4497932
• KB4509096
• KB4500109
• KB4498523
• KB4497727
• KB4502584
• KB4505903
• KB4508433

Also, I had reset my Windows 10 and updated Windows as soon as I installed it. I had the problem before and after, so no news here.

Please let me know if you see anything different than your instruction here.

Thank you.