HI HELLO I installing i have 3 devices but i dont see cannot activate
Welcome to the Community.
May I know where did you purchase the F-Secure Key from? And which device you are trying to install it. Please explain further in order for us to help you further.
I have no key for my F-secure booster.
My referentienummer: xxxxxx
EDIT : Remove Purchase Reference number.
I have moved your post to the correct board and I will send you a private message regarding your License key information.