How to ensure F-Secure is up-to-date
Check the version number of your copy of F-Secure
Right-click on the small F-Secure logo 
in your System Tray (the area at the right-hand end of your Windows Task Bar). A popup menu will appear:
Select About... A splash screen will open showing the version of your F-Secure.
If your version of F-Secure is older than 5.43 you should upgrade it now.
Check when your virus definition databases were last updated
You should check every day or two that your F-Secure virus definition databases are up-to-date. Read this page for instructions on updating your virus definition databases.
The instructions also tell you how to make F-Secure remind you every day to update your virus definition databases.
Upgrade your copy of F-Secure
Downloading and installing the latest version of F-Secure
If you are in doubt as to which version to install, the "Downloading and installing" page has a link to "Notes on different versions".
Configure F-Secure
You should ensure that F-Secure checks all files on your computer, not just files with certain extensions. Read this page for instructions on configuring F-Secure.
