As I said in a prior post, F-Secure is super-fast and I compared it to nine other AVs on several fast computers. Having said that, I had several crashes with it unfortunately which caused me to use another AV.
Windows 10 freezing-up several times requiring re-boot. Never a problem with Defender- so I reverted back to it.
I decided to give F-Secure a trial. However, when I tried to install it using Shadow Defender, F-Secure refused to install unless I first removed HitmanPro & Shadow Defender from my computer. So I took my ball & bat & went home to watch re-runs of Gilligan's Island.
that's a con of sd, not f secure. you can't use sd to test sw that requires a reboot during installation anyway. you should use vm instead.