"The library hostfxr.dll was found, but loading it from C:\Program Files (x86)\dotnet\host\fxr\3.1.1\hostfxr.dll failed"

> >dotnet --list-sdks
> Failed to load the dll from [C:\Program Files (x86)\dotnet\host\fxr\3.1.1\hostfxr.dll], HRESULT: 0x800700C1
> The library hostfxr.dll was found, but loading it from C:\Program Files (x86)\dotnet\host\fxr\3.1.1\hostfxr.dll failed
> 
> Installing .NET Core prerequisites might help resolve this problem.
>      https://go.microsoft.com/fwlink/?linkid=798306

I’ve just installed both 64 and 32 bit version of 3.1.101 from https://dotnet.microsoft.com/download/dotnet-core/3.1

The 64 bit version is fine, however the 32 bit version gives the above message.

I’m on Windows 10 (1909, 18363.592), so I think I have all the pre-requisites (that is to say there are none).

How can fix this?

[KirillOsenkov]

This is most definitely still an issue:

• install .NET SDK 64-bit
• install .NET SDK 32-bit
• run an app targeting netcoreapp3.1 and compiled with PublishSingleFile

Failed to load the dll from [C:\Program Files (x86)\dotnet\host\fxr\6.0.0-rc.2.21480.5\hostfxr.dll], HRESULT: 0x800700C1
The library hostfxr.dll was found, but loading it from C:\Program Files (x86)\dotnet\host\fxr\6.0.0-rc.2.21480.5\hostfxr.dll failed

Why is it trying to load the x86 hostfxr? Shouldn’t it be trying the 64-bit one?

[doghappy]

KB3063858 fixed the problem for me!

32-bit: https://www.microsoft.com/en-us/download/details.aspx?id=47409 64-bit: https://www.microsoft.com/en-us/download/details.aspx?id=47442

—— https://www.reddit.com/r/windows/comments/ik7sp7/does_anybody_have_the_kb2533623_update_for/