I cannot believe how naive and dumb people can be. 800,000 Opals were stolen due to malicious software, and now unknown 'security software' links are being spammed on here. Absolute new level of garbage.
F-Secure, unknown ?

F-Secure was the antivirus i chose in
2000 in order to protect the first Windows computer i bought...
Because compared to Norton's, F-Secure could run and protect your computer without slowing it like a ZX81 (a turtle).
F-Secure became widely adopted: they developped some of the main antiviral technologies that the main Antivirii companies are using now.
15 years after, F-Secure is still here, lots of hope i saw isn't (Altavista, Netscape, Napster, Sygate, Amiga...)
Saying F-Secure is unknown in the computer world is like saying Caravaggio is unknown in painting...