I have a disk filled with various malware from a hacker class that I took. I copied this disk to a folder on my C: drive before installing NOD32. After installing the product I ran a Smart Scan. If identified 269 instances of infected files. I opted to delete them and it said that it cleaned them. Then I turned around and ran it again. This time it found 219 files from the same folders and I cleaned them. Ran it a third time and this time it found 3 from the same folder and this time apparently cleaned them without my intervention. The fourth time I ran it, nothing new was found. Why did the smart scan behave in this manner? Why did it not find all of the files the first time through and why on the last time it found files, did it apparently clean them without my intervention?