Windows   Windows – .NET Framework 4.7.1 install stuck / hangs

I needed to install .NET 4.7.1 to allow updating Exchange 2013 to CU 21.
This is the installer I downloaded and tried to install:

But the installation never ends. It remains stuck without progressing in the “Installation progress” bar. Tested both with offline and online installation:
Windows - .NET Framework 4.7.1 install stuck hangs

To install .NET Framework 4.7.1 download the msu package from the following link:

Windows - .NET Framework 4.7.1 msu packages install succesfully

It seems that there is some kind of problem with the other format, but the msu worked correctly for me.

Update – For Windows Server 2016 (Thanks to Ryan comment):
If running into the same issue when installing CU10 for Exchange 2016 the msu of .NET 4.7.1 for Windows Server 2016 here it is:

22 thoughts on “Windows – .NET Framework 4.7.1 install stuck / hangs

  1. This happened to me too. No progress showing. However, I looked at the process manager. The install was using cpu and memory and the number was going up and down. Also, the event viewer was showing events in the Application section, so I just let it sit. It took over an hour but it did finish.

  2. I also ran into this, but as others, I waited, as the process manager showed aorund 25% cpu load on the .net setup installer.
    Waited 25-30mins, and after that, it was installed 😉
    But I admit, it just stands there as stalled, but it does actually process, as you can see on process manager 😉

  3. Ended up being a background silent “no restart” dism install that specifically required a restart. Run the offline installer and when it gets stuck, stop the install. There will eventually be a “failed / end” screen with a log link. In there, search for “error”. Towards the end, there will be a dism /silent /norestart /blahblah – remove the /silent /norestart options and run from a administrator command prompt.

  4. Installation will act like it isn’t making progress but will jump to being done after about 30 minutes. As noted above, it is running in the background but won’t always show its correct progress.

  5. and what to do if there is no progress for 2 hours? I’m just updating from 4.5 (integrated in Window 2012 R2) to 4.5.1 or 4.5.2

  6. Microsoft NET 4.5.2 is just broken for me. No matter what I do, it won’t install at ALL. Whoever made this program needs to take his/her job more seriously by fixing the stuck installation issue.

  7. The issue seems to be that the setup program is sometimes unable to start the Windows Installer service, for some unknown reason, and so sits there waiting. If you manually start the installer service the installation bursts into life. I’ve seen this on multiple releases of .Net runtime, including the latest 4.8

  8. I have the same problem when install .Net 4.8 which is required by Exchange 2016 CU18. Follow the idea in your post, unpack the “ndp48-x86-x64-allos-enu”, find out KB4486129 is .NET Framework 4.8 for Windows Server 2016.
    Install by msu file, it only takes me about 10 minutes.

  9. Still the same issue in April 2021. I’ve been waiting for 2hrs now with no progress. The program totally stopped and my mouse even stopped working. Everything just froze, what should I do?

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