If I may add on MacBook user, another option is:
After finding the suspicious link on your etc/hosts file, you can type the following command:
1. sudo nano /etc/hosts and press Return
2. Enter your password
3. Remove suspicious link
4. Press Ctrl-O to save
Was aware of this and was originally planning to add this however I felt that using a commandline interface text editor would be slightly too complex for some users so I opted to go the simple route of just manually changing it though, but for anyone else do note that this is a completely viable method of deleting host strings and you are free to use this if you wish
