I've been trying to install .NET Framework 3.5 on a Windows 8.1 computer without any luck. I tried the basic approach of downloading and installing it from MSDN which failed saying it couldn't connect to the internet.
Then I tried dism as explained in several forum posts:
Dism.exe /Online /Enable-Feature /FeatureName:NetFX3 /All /Source:E:\sources\sxs /LimitAccess
but I keep getting an error:
Error: 0x800f081f The source files could not be found.
and in the log file I found something weird:
Encountered an unknown option "source" with value "E:\sources\sxs"
I also tried copying the sxs folder to
c:\temp\sxs and putting this in the source.
According to this blog post it isn't possible to install .NET 3.5 after a language pack has been installed. Is there any known workaround to this by now? Danish is the only available language. I'm not able to switch back to English or even install an English language pack.