Problem with logging in to minecraft multiplayer servers

Whenever i open minecraft multiplayer servers are taking so long to ping and when i try to join one of them it takes some time to log in or it just crashes me out saying authinication servers are under meintence althought they are not .. its only for me sry for my english i need some help 
 
 
 
i think this file (Hosts File) is somehow taking a part in the problem .. the launcher wasn't logging me in saying make sure you are online so i searched it and some one said u need to delete this file so i did and it worked ..but after 5 days i faced this problem