i installed visual studio 2015 , but i can't sign in , not even connect to tfs server , i tried to stop the firewall and to repair the VS and i tried many internet connection and provider but nothing worked , even i tried the below solution : Visual Studio 2015 - Can't sign in, Use NuGet, etc. behind corporate proxy
please any suggestion ? im trying since 3 days to fix this issue i can provide you team viewer access if someone can help me
thanks in advance