The fact that we can see what's happening at all times without having someone standing over us or monitoring our work from afar gives me peace when I'm using my computer for many hours every day (and night). Not much as such so far but it doesn't feel like there are any major issues here - just be sure you're looking after your machine well! Nothing too bad yet though, good security software should sort out most things anyway unless Windows itself has been compromised somehow which hasn't happened thus far.