You can edit and save the host file,
C:\Windows\System32\drivers\etc\hosts, in a few simple steps:
- Copy or drag the host file to your machine's desktop
- Edit the file with notepad or any word processor of your choice
- Copy or drag the file back to the /system32/drivers/etc folder
Please note, if you try to edit the host file directly from the file explorer, you will receive an error that will not allow you to save.