Unity Download Assistant Error

When I Open the Unity 5.3.6f1 Download Assistant,
there is an error:
Error ‘SendRequest Error’ while downloading ini file from http://files.unity3d.com/bootstrapper/29055738eb78/unity-5.3.6f1-win.ini
Please verify that your are connected to Internet and your firewall allows downloading files.Alternatively download and install the individual components separately from http://www.unity3d.com

My Internet is OK and I shut down my firewall.
Error still there.
Help~

I open the exe on Compatibility Mode , it’s solved. You can try. :slight_smile: