Microsoft .NET Core 1.0.0 VS2015 Tooling Preview Update 2 fails to install with Error 0x81f4000: how to fix it

If you stumbled upon this post, chances are you’ve just downloaded Microsoft’s Visual Studio 2015 Update 3 together with the Microsoft .NET Core 1.0.0 VS2015 Tooling Preview Update 2, following the instructions written to the new Asp.Net Core website.

The Problem

However, right after installing the former, the latter executable refuses to install showing up the following error popup:


If you follow the given suggestion and open up the log file, you’ll see a bunch of checks that seemingly went ok, until the one who’s causing the issue:

 The Fix

The issue seems to be generated by the fact that VS Studio 2015 Update 3 is not correctly seen by the setup executable, thus making the internal checks erroneously fail.

Luckily enough, there’s a simple workaround we can use to skip these checks by using a command-line parameter that does just that.

To get past the issue open a command prompt, navigate through the folder where you downloaded the Microsoft .NET Core 1.0.0 VS2015 Tooling Preview Update 2 executable file and type the following:

As soon as you hit ENTER, the setup program will start by skipping the erroneous Visual Studio Update checks, allowing you to install the package.


That’s it for now: happy update!


About Ryan

IT Project Manager, Web Interface Architect and Lead Developer for many high-traffic web sites & services hosted in Italy and Europe. Since 2010 it’s also a lead designer for many App and games for Android, iOS and Windows Phone mobile devices for a number of italian companies.

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  • Nabil Naeem

    Thanks alot!
    This have been extremely helpful.
    Cheers 🙂

  • Bob Tabor

    You, sir, are a genius. Thank you!

  • Roberto Noda

    Thanks, you saved the day!

  • Kalpesh Satasiya

    Thanks, Its work for me.

  • gutun

    thanks works for me

  • Aleksandar Pesic

    After three unsuccessful repairs (suggested by the wizard), I’ve finally ran into this post. Thanks mate!

  • Sebastian

    Thanks a lot! Saved me the trouble of reinstalling it. Update+Preview2 worked on 2 machines, on machine 3, this error. Thanks for the solution!!!

  • Ivan

    Thank you for existing :D!!

  • Denis Voituron

    Thanks for your tip 😉

  • Thanks for sharing. This is the link to that known issue:

  • Thanks a lot 🙂 that was helpful.
    I hope the next update will work normally.

  • Perfect! Expect you’ll be getting a lot of hits over the next few days as people use the launch of Windows 10 Anniversary Update as a reason for a clean install and hit this problem when they try to reinstall Visual Studio, as I just did. Thanks!

  • csharpner

    Thanks man! I just wasted HOURS today trying to fix this, thinking it was a VS 2015 issue!

  • 謝政廷(Duran Hsieh)

    Thanks a lot 🙂 it works for me

  • André Krämer

    Thanks! Worked like a charm!