If VIPRE is unable to update the threat definitions, this can be due to the definition files being corrupted.
This is commonly caused by intermittent or no internet access or shutting down your computer during the definition update process.
Keep in mind that whatever setting you choose will require the computer to be left on for specified amount of time before VIPRE will check for an update.
For example, VIPRE will not check for updates if the computer is left on for 1 hour and the update interval is set to check every 2 hours.
Like many of its competitors, F-Secure released a manual updater for the virus signatures, offering a solution to updating definitions when the Internet connection is down.
The updater contains the latest definition files for various F-Secure products, including F-Secure Antivirus (for Workstation / Client security), F-Secure Internet Security and some of the business editions.
An average of ten new viruses and spyware are found each day and the rate continues to grow.
There is also a new breed of threats on the Internet, such as carefully planned targeted attacks that can pass through conventional security solutions unnoticed, possibly taking over your computer for illegal purposes.
This should provide enough available space for the definition update to complete.
I don't think it is an issue of getting the virus definition. Well, first of all - this site is really not a substitute for the Symantec's techsupport.
If you have a support contract with them - I really suggest you contact them instead.
In this case, the definitions need to be downloaded manually to your PC: Definition update interval is too infrequent If you do not leave your computer on for extended periods of time, your update interval may be set to a setting that is too infrequent.
VIPRE by default will automatically update definitions every 30 minutes.