How to allow port 80 .NET remoting traffic


May 8, 2012
i have a game launcher who do not want to update because:

"The system is unable to connect to the update server The Windows operating system has a proxy redirecting port 80 to your local machine port 8877
If you have a real proxy, make sure it is configured to allow port 80 .NET remoting traffic. If you do not have a proxy, you may have leftover problems from malware in which case you will have to disable the proxy on your machine."

i have made many tests and i have no malware and no proxy!

so as the error message says, the problem is because the port 80 is not allowed .NET remoting traffic, how do i allow it ?