My http://localhost is not working. But the address is working fine. I have multiple webservers installed on my computer and it is the same problem with them all.

I think, but I don't know, that the problem started when I installed IIS, but I have inactivated IIS now.

I am using Windows Vista. How can I make http;://localhost working again?

  • Can you be more specific about "not working"? Do you get an error message?
    – coneslayer
    Jul 22, 2010 at 13:23

2 Answers 2


Check your hosts file - this is where host names are resolved in first place. Normally, you should find this line there: localhost

If not, add this line, save it and then test again, whether it works.

The hosts file can be found at: %WINDIR%\system32\drivers\etc

You can edit this file with any text editor (e.g. notepad).

  • You beat me to it! ;) +1
    – Pylsa
    Jul 22, 2010 at 13:39
  • Its name is hosts, not host. Jul 22, 2010 at 14:13
  • Also.. sometimes things "trip out" and require a reboot after making this edit. Apr 17, 2021 at 1:52

Mine is Ubuntu 20.04 VM

I had this following line.

::1     localhost ip6-localhost ip6-loopback

I commented that line and added the following line.

::1     ip6-localhost ip6-loopback

Basically removed

::1     localhost

It now works.

The final look of the hosts file is as follows.       localhost       vagrant.vm      vagrant

# The following lines are desirable for IPv6 capable hosts
#::1     localhost ip6-localhost ip6-loopback
::1     ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters w1 w1

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