Visual Studio 2005/2008 on Vista Internet Explorer cannot display the webpage

I faced a strange problem with Visual Studio 2005 and Visual Studio 2008 which is I have several ASP.NET Projects some of them using .NET 2.0 or Visual Studio 2005 and the others are using .NET 3.5 or Visual Studio 2008.

The problem was when I try to run the Web Application I got this error:

Internet Explorer cannot display the webpage

I am not using IIS for these Web Application. I have tried the usual solutions such as Restart the Visual Studio, Restart my Laptop and Reinstall Visual Studio but nothing solve this problem. After searching for a solution for this problem I finally got the answer.

All you have to do is editing the host file located here %windir%\System32\drivers\etc\hosts
Open this file with Note Pad don’t forget to right Click and Run as administrator. Just comment the line that contains localhost as shown below:

No restart is needed, either of computer or Visual Studio.

# Copyright (c) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a ‘#’ symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# 127.0.0.1 localhost
# ::1 localhost