Having recently (been about 6 months) switched from mac to PC, I have culture shock when it comes to spyware and viruses and the like. A friend recommended Spybot when I was having some problems after a download. So it seemed to help - and I did a disk cleanup. My questions are: 1) opinions on using this software, 2) when the window comes up which says "search and destroy has detected an important registry entry that has been changed," and gives me the choice deny change or allow change, which one means I am letting Spybot fix it. And should I just trust it when I don't understand what it found?