I get this problem often on Windows Server 2008 R2, 2012, 2012 R2, Windows 8.1… Maybe it is something within network, I`m not sure, but I get this picture often:
.Net Framework 3.5 could not be installed
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I get this problem often on Windows Server 2008 R2, 2012, 2012 R2, Windows 8.1… Maybe it is something within network, I`m not sure, but I get this picture often: