I got a message telling to update a few minutes ago, is this legit
The upgrade option is a legitimate one and there was an upgrade released.
Could you share with us the message you see for the update as a screenshot? Which F-Secure product are you using?
F-Secure SAFE, I have a free one which lasts for 12 months (expires 15/12/2015)
here's what I found in the About screen
Antivirus 14.139 build 100DeepGuard 5.0 build 580E-mail Filtering 1.02 build 20399Management Agent 8.30 build 43205User Interface 16.00 build 161Virus Protection 11.00 build 21210