I'm using Win10 with Defender / Security Essentials.
I have a problem with WinSCP (thanks for an awesome program by the way), in that scrolling the Local browser in my Downloads folder, which naturally contains quite a few large archives and .exe installers, usually always freezes and lags for a few seconds repeatedly when scrolling down. Obviously this is because the on-access AV engine is scanning the files that the browsing window is showing.
I was just wondering, is this necessary? Is there perhaps something the program is doing that's causing this, that you might consider changing? I can't see an option for file previews or anything like that to turn off.