Can't enable .NET Environment in Windows 10 1903

Anonymous
2019-04-10T07:18:57+00:00

Well, this is a showstopper for me. I'm in the Release Preview ring & installed 1903 (18362.30) yesterday . Update went fine. No issues experienced.

Got a Cumulative Update to install today (KB4495666). Installed it & rebooted. Build is now at 18362.53. .NET framework was disabled & 90% of my applications will no longer run! In "Control Panel/Programs and Features/Turn Windows Features on or off", ".NET Environment" is unchecked. If I check it & hit "OK" it take about 10 seconds & says "Windows completed the requested changes". The .NET Environment, however, is still unchecked when I go back to "Turn Windows Features on or off" & >NET applications still don't work.

I've uninstalled all of the updates installed today (KB4495666 & KB4493478), but .NET is still utterly broken. I've read that this was an issue prior to the release of 18362 to the Release Preview ring but was supposed to have been fixed. Looks like this MAJOR bug was reintroduced with the cumulative update?

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2019-04-11T08:22:34+00:00

    I ran into the same problem as the questioner. Cannot open Visual Studio 2019, since .Net Framework broke.

    The dilemma is that, in this situation, you cannot run PowerShell since the broken .Net Framework, and it shows "cann't find mscoree.dll" (It's in Chinese")

    I solve the problem, and post the solution in Chinese community:

    https://answers.microsoft.com/zh-hans/insider/forum/all/%e5%85%b3%e4%ba%8e-windows/2517e4ed-3c37-42c1-a1a4-b5a806a912ac

    But the system that questioner has deprecated pkgmgr.exe, I just figure out how to use DISM instead.

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  2. Anonymous
    2019-04-11T07:59:05+00:00

    That /All command will work in the PowerShell commands, too, so I will add it to my post above. However, I think that the Features that you list are the Parent ones.

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  3. Anonymous
    2019-04-11T07:41:50+00:00

    I just check how DISM use, figure that I was wrong about using DISM command.

    https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-8.1-and-8/hh824822(v%3dwin.10)#to-enable-windows-features

    It says:

    Enable a specific feature in the image. You can use the /All argument to enable all of the parent features in the same command. For example, type:

    Dism /online /Enable-Feature /FeatureName:TFTP /All

    So would you mind trying to creat the bak file again, with these contents below:

    Dism /online /Enable-Feature /FeatureName:Microsoft-Windows-NetFx3-OC-Package /All

    Dism /online /Enable-Feature /FeatureName:Microsoft-Windows-NetFx4-US-OC-Package /All

    Dism /online /Enable-Feature /FeatureName:Microsoft-Windows-NetFx3-WCF-OC-Package /All

    Dism /online /Enable-Feature /FeatureName:Microsoft-Windows-NetFx4-WCF-US-OC-Package /All

    And run as admin.

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  5. Anonymous
    2019-04-11T07:16:52+00:00

    Here is a PowerShell command that will list all of the available Windows Features and their State:

    Get-WindowsOptionalFeature -Online | Sort-Object State,FeatureName | Format-Table

    What my list shows as enabled is:

    Containers-DisposableClientVM                                   Enabled

    FaxServicesClientPackage                                        Enabled

    Internet-Explorer-Optional-amd64                                Enabled

    MediaPlayback                                                   Enabled

    Microsoft-Hyper-V                                               Enabled

    Microsoft-Hyper-V-All                                           Enabled

    Microsoft-Hyper-V-Hypervisor                                    Enabled

    Microsoft-Hyper-V-Management-Clients                            Enabled

    Microsoft-Hyper-V-Management-PowerShell                         Enabled

    Microsoft-Hyper-V-Services                                      Enabled

    Microsoft-Hyper-V-Tools-All                                     Enabled

    Microsoft-Windows-Client-EmbeddedExp-Package                    Enabled

    Microsoft-Windows-NetFx3-OC-Package                             Enabled

    Microsoft-Windows-NetFx3-WCF-OC-Package                         Enabled

    Microsoft-Windows-NetFx4-US-OC-Package                          Enabled

    Microsoft-Windows-NetFx4-WCF-US-OC-Package                      Enabled

    MicrosoftWindowsPowerShellV2                                    Enabled

    MicrosoftWindowsPowerShellV2Root                                Enabled

    MSRDC-Infrastructure                                            Enabled

    NetFx4-AdvSrvs                                                  Enabled

    Printing-Foundation-Features                                    Enabled

    Printing-Foundation-InternetPrinting-Client                     Enabled

    Printing-PrintToPDFServices-Features                            Enabled

    Printing-XPSServices-Features                                   Enabled

    SearchEngine-Client-Package                                     Enabled

    SmbDirect                                                       Enabled

    WCF-Services45                                                  Enabled

    WCF-TCP-PortSharing45                                           Enabled

    WindowsMediaPlayer                                              Enabled

    WorkFolders-Client                                              Enabled

    A corresponding command to enable a Windows Feature in PowerShell would be:

    Enable-WindowsOptionalFeature -Online -FeatureName WCF-TCP-PortSharing45 -All

    I am not sure which .NET features you need, but the command to enable them should be about the same, using the right FeatureName.

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