Can't sign in to Visual Studio 2013 - Browser is security restricted or JavaScript is disabled

I have Visual Studio 2013 Express edition installed and the 30 days trials are about to expire. In order to license it I need to sign in via Visual Studio but it fails. Here is the thrown exception:

[Diagnostic] Browser is security restricted or JavaScript is disabled.: BrowserFlowException during ExplicitSignIn
   at Microsoft.VisualStudio.Services.Client.Controls.VssFederatedCredentialPrompt.<GetCookieAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Services.WebApi.VssHttpClientBase.<SendAsync>d__3f`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Services.Client.VssServerDataProvider.<ConnectAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at Microsoft.VisualStudio.Shell.Connected.ConnectedUser.Connector.<ConnectAsync>d__1.MoveNext()

I have tried lowering the IE security by going to Internet Option>Security, disabling Protected Mode and selecting the lowest security level (Medium), but I get the same error.

Then I selected Custom level and configured the absolute most permissive security settings, but still no success.

I have also installed the latest IE 11 and disabled firewall.

This is clearly not a security issue.

There is also a submitted bug at Connect with no signs of progress.

Does anyone have any news/suggestions on this matter ?