Klixo resells a product called F-Prot Antivirus, if you are using this software your version may now longer be supported by them. If this is the case you will no longer be able to update your virus signature files.

Here is a link to the F-Prot.com website where you will find instructions on how to upgrade F-Prot Antivirus on your computer:

1. Go to F-Prot.com using the link below:
   http://www.f-prot.com/support/windows/fpwin_faq/482.html
2. Follow the instructions from there.