Windows 8.1 .net3.5 install problem

Trying to install .net 3.5. it will not it tries to download it from Win update and fails. I tried the offline installer and it then tries to also download it an failes. I'm tring the powershell method

dism /online /enable-feature /featurename:NetFx3 /All /Source:C:\sources\sxs /limitaccess

it gets to 65% and says something about can't find source. I've tried several DVDs and SXS folders. I need the .net 3.5 for a business application. Can it be forced on there any other way?
Axis52401Security AnalystAsked:
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Just turn on the feature in "Programs and Features"
Axis52401Security AnalystAuthor Commented:
Of course I tried that
Seth SimmonsSr. Systems AdministratorCommented:
did you copy the sources file to C?
did you try specifying the media directly by using the dvd or mounting the iso?
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Axis52401Security AnalystAuthor Commented:
All 3
JohnBusiness Consultant (Owner)Commented:
Try NET Fix verifier.  The .NET Framework Repair Tool can be found at the following locations:

Download it, run it and see what versions you have and if it might help you.
Axis52401Security AnalystAuthor Commented:
Tried that too
JohnBusiness Consultant (Owner)Commented:
Go to Windows Features, uncheck .NET 3.5 and 4 and restart the computer.

Upon startup, run System File Checker (SFC /SCANNOW) twice and restart again.

Now go back to Windows Features and check the two .NET items and restart. Test again.

Remember (I have seen a lot of this here), when "nothing works" it usually means reinstalling Windows.
I had exactly the same behavior and for me it was simply the wrong DVD. I ran windows 8 x64 but had inserted an x86 DVD.

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Balraj KhatriTechnicianCommented:
Use proper windows disk. For example if you have windows 8 x64 then you have to copy sxs folder from sources folder from windows 8 x64 windows installation disc to the drive which contain windows on your computer. say "c:/sources/sxs". Letter "c" is windows partition of the computer.
Then after copying these files from disk run command prompt as administrator and type or copy paste this command and hit enter.
command is : dism /online /enable-feature /featurename:NetFx3 /All /Source:C:\sources\sxs /limitaccess
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