Well, something is blocking proxy_sa.exe and I can't see what it is.
It might be one of the programs you have currently installed.
It might be one of the programs you previously had installed, but part has been left behind. (Some security software perhaps)
It might be some thing malicious in your PC
It might be some unknown config problem in your PC.
The only solution I can offer is for you to launch MTA via chrome, and use it from there. This link will start MTA and when it fails to connect, you can go to the server browser:
mtasa://aaa.aaa
.