Cannot log in to SSRS 2012 using any account

I have installed SQL Sever 2012 along with Reporting Services.

I have configured Reporting Services using the Reporting Services Configuration Manager. It seems like the service is running properly, however I am unable to log in to it using any account.

I have tried using :

• the built-in Administrator account, added to the sysadmin role in SQL Server.
• another account, the one that was used to install SQL Server, also a sysadmin and a member of the Administrators group.

I have tried both logging in to the Report Manager in IE (also tried to run IE as Administrator as sometimes suggested) and via SSMS.

I am trying to log in locally.

I can tell that the service is running because when I try to log in to the Report Manager, I seen the following error in the familiar web interface:

The request failed with HTTP status 401: Unauthorized.

Edit:

Added screenshots are requested

The connection goes through without a problem

As you can see I have changed the default port. I started with 80 but it wasn't working and site I already have IIS serving websites on port 80 I thought it was safer to use another port.