I had a zip file with the WIN32/Trojan Downloader. NOD did not detect anything until the file was unzipped and the virus was loose on my system. Then Nod couldn't delete it. Luckily, my fiirewall caught it trying to access the internet. Then I had to spend time picking it off my system. I'm very dissapointed that Nod didn't stop this. Yes, I had archives checked. I've only had Nod a couple of months and thought it was great but now I feel like I'm not really protected anymore.