It appears that starting in Windows 10, .NET 3.5 is treated as a "feature" that may be disabled by default. You have to turn it back on I guess. Silly Microsoft. Here's how...
http://answers.microsoft.com/en-us/insi ... 519f36d7a4
"a) Press ΓÇ£Windows LogoΓÇ¥ + ΓÇ£RΓÇ¥ keys on the keyboard.
b) Type ΓÇ£appwiz.cplΓÇ¥ in the ΓÇ£RunΓÇ¥ command box and press ΓÇ£ENTERΓÇ¥.
c) In the ΓÇ£Programs and FeaturesΓÇ¥ window, click on the link ΓÇ£Turn Windows features on or offΓÇ¥.
d) Check if the ΓÇ£.NET Framework 3.5 (includes .NET 2.0 and 3.0)ΓÇ¥ option is available in it.
e) If yes, then enable it and then click on ΓÇ£OKΓÇ¥.
f) Follow the on-screen instructions to complete the installation and restart the computer, if prompted."
~ This was taken from the link above
IF that doesn't do it,
What antivirus/firewall do you use? AVG, Avast, Panda???
Did you check the windows firewall?
I haven't tested anything in Windows 10 yet, but I hear it's working for other people. Did you recently upgrade? If so, was it working before the upgrade? If so, I have a hunch it changed some of your Windows features.