I'm also only an F-Secure user (their home solutions).
Sounds that your installation is only as trial-time account. Did you register your TalkTalk F-Secure account (subscription/promo) based on TalkTalk guides?
I think that one option is to contact TalkTalk support about subject. Another option is try to search TalkTalk articles about registering/installing/activating F-Secure solution.
As Ukko has mentioned, it is best to get in touch with Talk Talk support to check on your subscription information.
This topic has been closed due to inactivity. If you would like to discuss this topic further, please start a new post.
You can reference this topic in your post by adding this link:
Visit the Community
Check our Forums or How-to & FAQs for advice or answers
View User Guides
Refer to our getting started guides and product manuals
Talk to our Support and get answers to your questions