Lokoth

AVG is the best I've come across so far. I recommend paying for the full version as well. It doesn't interfere with your daily computing and it seems to catch just about everything. Saved my compy when I let a nephew play online for a bit. No nekkid pictures, but he hit a ton of warez sites and other disreputable".ru" domains. Now I know better for when I have my own kids.

Just do what we used to do in the old Dreamcast days: Unplug their controller, er, mouse and keyboard. THat should provide enough shock and awe.