Does F-Secure Slow Down Computers? Any software running on a computer will slow it down. Compared to other antiviruses, F-Secure's products won't slow down a system much. Lab tests find that, at most, you can expect a load-time increase of 10 percent, compared to up to 30 percent for the industry average.

Is F-Secure bad?

Performance. As far as malware protection goes, both AV-Test and AV Comparatives rate F-Secure among the very best. In AV-Test's most recent report – December 2020 – SAFE 17 (the version tested) scored top marks for protection, usability and performance.

Is F-Secure better than Windows Defender?

If your experience is about F-Secure SAFE or F-Secure Internet Security - then solution with Browsing Protection module. So, it is definitely better than only Windows Defender with Malwarebytes Free (as on-demand scanner?!). ... But F-Secure also with good detection against known and unknown malware.