You can also go to this page to download our products installers:
There is no such thing as an installer package (big monolithic file) for the F-Secure home-user / consumer market products.
The download link Ben suggested above, will give you the "webstub" of F-secure 2016. That is a small file which starts the product component download as a kind of streaming. It is similar to how Flash Player or Adobe Reader installation works nowadays.
Best Regards: Tamas Feher, Hungary.