Invalid solution to modify Hosts file under Windows7

Often for development convenience, or to block out some malicious sites, we will be in the hosts (c:\windows\system32\drivers\etc\hosts) file the corresponding domain name, for example:

In the, we can see that the www.ywec.com point to 127.0.0.1, Ping the domain name at the command line, we found that it has been pointed to 127.0.0.1, sometimes we do the operation as shown above, found that the domain name is still pointing to the original IP, what is the matter? In general, there are the following situations

1. The file is saved without the use of ANSI encoding to save, workaround: Change the file encoding to ANSI for saving

2. The DNS Client service is enabled (the service is DNS-resolved caching Service) Workaround: Disable the service and, if the service is automatically enabled, turn it on manually instead.

Invalid solution to modify Hosts file under Windows7