Beware of changed HOSTS files

If you are reading this, it means your HOSTS file isn't changed (yet!).
Cheating webmasters use an exploit to add popups to our site,
or even redirect my whole site to a different page! 
You can find your HOSTS file here: 

- Windows 98: c:\windows\hosts
- Windows 2000: c:\winnt\system32\drivers\etc\hosts
- Windows XP: c:\windows\system32\drivers\hosts

Open your HOSTS file (no extension) with notepad. The only line in there, should be: 
127.0.0.1 localhost 

If you see something like this:
80.54.28.120 hotmail.com
80.54.28.120 microsoft.com
80.54.28.120 yahoo.com
80.54.28.120 google.com
etc. etc. 

It means, your HOSTS file is changed illegally.
In this case, you wouldn't be able to visit hotmail.com, microsoft.com, yahoo.com and google.com! 

To remove all redirects, delete everything but 127.0.0.1 localhost and save the file.