Installing .net framework 3.5

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When I am installing SQL Server 2008 R2 on Windows 8.1 there was an error saying download and install .net framework 3.5 (including 2.0 and 1.0)

And when I'm trying to install .net framework 3.5 from command prompt with following command,

C:\Windows\system32>DISM /Online /Enable-Feature /FeatureName:NetFx3 /All 
                         /Limit Access /Source:c:\Windows\Logs\DISM\dism.log

I got the error

Deployment Image Servicing and Management tool
Version: 6.3.9600.16384

Image Version: 6.3.9600.16384

Enabling feature(s)
[===========================65.8%====== ]

Error: 0x800f081f

The source files could not be found.

Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see http://go.microsoft.com/fwlink/?LinkId=243077.

Please help me.......

windows
sql-server-2008-r2
.net-3.5
asked on Stack Overflow Aug 16, 2014 by Rewati Nangare • edited Aug 16, 2014 by marc_s

3 Answers

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.NET framework 3.5 and 4.5 are parts of windows 8. so you have to add it using the windows features as described below :
go to your control panel -> Programs and features -> Turn windows features on or off tick the check box .NET framework 3.5

answered on Stack Overflow Aug 16, 2014 by Sam
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some time the two KB not show up. the only way to uninstall those two KB is download tools from https://support.microsoft.com/en-us/kb/3005628 after remove those two KB. the 0x800f081f will gone.

answered on Stack Overflow Jun 24, 2015 by Harvey
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In my case I had to update with latest patches (optionals also) the Operating System.

Then I added the W2012 dvd to disk D

And finally run the command (as administrator): 

dism /online /enable-feature /featurename:NetFX3 /all /Source:D:\sources\sxs /LimitAccess
answered on Stack Overflow Nov 5, 2019 by Francesco

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