Products & Services
it would help if you could tell what service/product you use and what operating system.
What you can do is download the definitions from here and update manually.
If you are using F-Secure Internet Security 2012 or Anti-Virus 2012, see our support article "Product indicating that updates are old" at http://www.f-secure.com/en/web/home_us/support/article/kba/15655/k/old/p/1.
If you are using an older version of the above products, see support article "Product indicating that updates are old" at http://www.f-secure.com/en/web/home_us/support/article/kba/15473/k/old/p/1.