I've already downloaded
dotnetfx35 from here
How can I install it on Windows 8?
I've already read the following post
How to enable .NET Framework 3.5 on Windows 8 without downloading it?
But, I've installed Win8 x64 and in my win8 iso file's
sxs folder doesn't exist
.net x64 and I'm getting the following error :
Error: 0x800f081f the source files could not be found