In fact, Win8 ISO with the function of net 3.5, but not with the system installed two installed up. So as long as you have the same version of the ISO file with your system, you can implement the non-networked installation net3.5. First put your ISO on load. The WIN8 system can open the ISO file without the need for additional software. After loading the computer you can see a drive, remember its letter, after the use,.
Then win+x, select command Prompt (Administrator). In the box that pops up, type: Dism.exe/online/enable-feature/featurename:netfx3/source:j:\sources\sxs. Note that my drive letter is J and you want to change it to your drive letter. Then enter and wait a few minutes for the installation to complete, as shown in.
At this point we become the completion of the framework installation, we may wish to try it, if there are problems, may wish to comment in the bottom of this article Oh!
Win 8.1 Installation framework3.5