Do the following things :
1. Turn off your firewall and anti-virus.
2. Add your FGunZ Launcher to your exception files.
3. If your Launcher got deleted by your anti-virus, you can download it from this website : http://fgunz.net/gunzweb/gunzupdate/
4. If still not working try downloading gunzupdate.rar from the same website.
5. Unrar it and copy/paste them into your FGunZ folder.
