Record practice on the first day of the first pit:
SwitchHosts download URL: https://github.com/oldj/SwitchHosts/releases
Open the program after next from here:
Right Run as administrator mode and found the error:
Then, as shown in the figure went hosts file, right property, find the "Security" tab, giving all User privileges, set the file as read-only - applications.
Then open it.
