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
    2019-06-26T02:50:40+00:00

    Perhaps you misread my last post. You can stay on the current public build if my repair steps work for you.

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  2. Anonymous
    2019-06-26T01:41:35+00:00

    Definitely still an issue with a fresh install of 18362.175 (on a fresh SSD to boot)

    Was able to uninstall the KB4495620 update but attempting to run the DISM command resulted in Error: 14081 The referenced assembly could not be found.

    This took over a week of digging to even get to this thread. It's not an easily identifiable issue as most programs that rely on .NET compatibility components are not throwing errors that indicate this is what's wrong. Worse, there are a lot of instructions and installation options to download various versions of .NET but they're basically all pointless since you literally are unable to do so but instead must enable it through optional features. This is outrageous that I must hop on a beta branch in order to get a fix so at least 3 applications can work prior to Spring 2020.

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  3. Anonymous
    2019-06-21T22:34:52+00:00

    https://developercommunity.visualstudio.com/comments/617759/view.html

    I can still replicate this issue on Windows 10 Version 1903, build 18362.175. The fix is not as straightforward as installing the latest Windows Updates.

    However, this can be fixed with some extra steps and still keep the device on Version 1903.

    To replicate the issue:

    DISM /Online /Disable-Feature /FeatureName:NetFx4-AdvSrvs /FeatureName:WCF-Services45 /FeatureName:WCF-TCP-PortSharing45 /FeatureName:NetFx3 /FeatureName:Microsoft-Windows-NetFx3-OC-Package /FeatureName:Microsoft-Windows-NetFx4-US-OC-Package /FeatureName:Microsoft-Windows-Client-EmbeddedExp-Package /FeatureName:Microsoft-Windows-NetFx3-WCF-OC-Package /FeatureName:Microsoft-Windows-NetFx4-WCF-US-OC-Package

    Run Optionalfeatures.exe to see the problem list of Optional Features.

    To resolve the issue:

    Uninstall KB4495620

    DISM /Online /Add-Capability /CapabilityName:NetFx3~~~~

    Install KB4495620 --- This cannot be reinstalled without first adding back the NetFx3~~~~ Capability, as it will indicate that the KB is not applicable.

    DISM /Online /Enable-Feature /All /FeatureName:Microsoft-Windows-NetFx3-OC-Package /FeatureName:Microsoft-Windows-NetFx4-US-OC-Package /FeatureName:Microsoft-Windows-Client-EmbeddedExp-Package /FeatureName:Microsoft-Windows-NetFx3-WCF-OC-Package /FeatureName:Microsoft-Windows-NetFx4-WCF-US-OC-Package

DISM /Online /Enable-Feature /FeatureName:WCF-TCP-PortSharing45

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  4. Anonymous
    2019-06-18T22:36:53+00:00

    KB4495666 is an update for Windows Insiders ONLY.

    Those who are not part of the Insiders Program and therefore are not exposed to untested software have nothing to fear.

    Just wanted to straighten that out as there seemed some confusion on that point.

    https://support.microsoft.com/en-us/help/4495666/windows-10-update-kb4495666

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  5. Anonymous
    2019-06-18T22:35:57+00:00

    Sorry about that. 😁

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