I had Unity 64 bit installed and working for a while but one day it just stopped working, nothing happened after I double clicked the Unity icon on the desktop. So then I uninstalled and reinstalled Unity 64 bit and during the installation it said failed to enable .NET framework 3.5 and that it might not work after install. I just clicked OK and then the installation finished. Now when I try to run it it just stops responding at the splash screen. How do I fix this?
Bump
http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe
http://download.microsoft.com/download/b/a/4/ba4a7e71-2906-4b2d-a0e1-80cf16844f5f/dotnetfx45_full_x86_x64.exe
try install this
MermaidMan i have the same problem as you. Have you managed to solve it?