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cannot install .net 3.5 on windows 2012 via add roles/features

Posted on 2015-02-09
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Last Modified: 2015-02-14
hi, I have a windows 2012 vm on hyperv. I cannot get it to install .net 3.5. I go via the add roles and features wizard. tick it and then tell it the location of the dvd and I've tried a mounted ISO.
when I install, I then get
installation of one or more roles services or features failed.
the source files could not be found. try installing the roles........
click specify an alter.......

I have been using e:\source\sxs

I've also tried
dism /online /enable-feature /featurename:NetFX3 /all /Source:e:\sources\sxs /LimitAccess
and get to 66.2% with the source files could not be found.....

HELP, any thing else I can try
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Question by:total123
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Expert Comment

by:pjam
ID: 40598960
I had the same issue on a new Windows 2012 R2, I had to uninstall VC++ 2012, then I could install3.5
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Author Comment

by:total123
ID: 40598998
I have just removed VC ++ 2012, it was part of avg, also removed that and hasn't worked
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LVL 17

Expert Comment

by:pjam
ID: 40599237
How about any other VC++?
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Author Comment

by:total123
ID: 40599286
There were two, but none now
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Accepted Solution

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pjam earned 500 total points
ID: 40600580
Try it again using the ".NET Compact Framework 3.5 Redistributable" before Updates install C++ again.
https://www.microsoft.com/en-us/download/details.aspx?id=65
I think that is the correct redistributable.
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Author Comment

by:total123
ID: 40609517
Hi, we could install the link fine, but not update. This then lead onto us looking at our user policies and discovered it was that effecting Windows 2012 installing .net.
We also had to remove .net 4 before hand to.
Quite a mission
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Author Closing Comment

by:total123
ID: 40609518
The suggestion helped point us to find the problem
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