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Why dotnet framework 3.5 setup failed?

Posted on 2014-11-03
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Last Modified: 2014-11-17
This is using MS Windows 2012 r2 server. Dot net framework 4.0 is setup by the developer. However, they also demand dot net framework 3.5 to be install. So, I went to the server manager > roles and features, and then follow the wizard with attempt to get it installed. The setup failed even I select to point the source to the w2k12 r2 cd, why?

Thanks in advance.
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Question by:MichaelBalack
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by:Seth Simmons
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go to programs and features -> show installed updates
see if KB2966826, KB2966827, KB2966828 are installed
if they are, uninstall and try .net framwork install again
it is known to prevent .net 3.5 from being installed
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by:MichaelBalack
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Hi Seth,

Just checked, the above 3 updates not installed.
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by:Chris
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Not sure why it failed but the way I had to get it installed on a Win8.1 Pro was to installed from the Install CD.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs

Change the drive letter to match your CDROM

This should also work for Server 2012.
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by:MichaelBalack
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Hi Chris,

Try the dism command, same result - failed at 65.9%
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MichaelBalack earned 0 total points
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Hi all,

I tried these:

      a. Copy the w2k12 r2 ISO to the server
      b. Unzip the above ISO
      c. Run the add roles and features > tick Dot net framework 3.5 (for 2.0 & 3.0)
      d. Select alternative share, and point it to the unzipped ISO folder
      e. Surprisingly, the installation proceed and completes
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by:Steve
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its an odd issue with this version of server I think.

add the role/feature and look at the bottom of the wizard for an option something like 'specify alternative source'
enter <cdrom>:\sources\sxs (eg d:\sources\sxs) and give it a go. should work fine.
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by:MichaelBalack
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It works
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