I would disconnect from the net (turn off your router), then uninstall Kapersky, reboot, then install ESET. After installing, run a smart scan on each computer (probably do this overnight, although it only takes about an hour on mine). Then that's it -- no need to ever run a scan again, unless you feel the need for some warm fuzzy reason. It'll update itself auto, and scan everything that comes and goes.
It doesn't work that way Tigger. It's intelligent enough to see patterns and changes. It will not allow me onto a website that has malicious code -- it throws this red box on-screen, and says SORRY DUDE -- you can't go here! Actually, I can't recall the exact text, but it won't let you go there. It puts a hook in, and scans every web page and code, before your browser gets it.