Hosts Tray

Hosts Tray is a small-sized application that gives you quick access to the Windows Hosts file for viewing information and making modifications. It is easy to set up and runs from the system tray.

Although this is not mentioned during installation, the utility gets integrated into the system autostart sequence, which means that it automatically launches every time to log into Windows. It doesn't create an option for disabling this; you can either use the built-in System Configuration tool (msconfig) or resort to a third-party application.

The Hosts file is a plain text document with the INI file extension. It holds configuration details which instruct the operating system how to link specific host names to their corresponding IP addresses. It lets you add comments.

The default INI is a sample Hosts file with Windows TCP/IP data, and it contains a couple of examples with the correct syntax for IP addresses, host names and comments (if any). 

Make sure to create a backup of the original Hosts file or to copy the original text somewhere safe, in case you want to restore the settings to default afterward, because there is no option in Hosts Tray dedicated to this.