How many times did that happen? It probably was a corrupted file. Just delete and try again. There are some damaged files out there so if you d/l the same one again, try a different host if it's available. Sometimes though you just have to give up on a certain file. I've been trying to get a certain game for the last month. D/l ed it from a dozen different sources on this and another gnutella client. And everytime I try to install it, it's damaged. So....As far as viruses, yes it's possible to bring one home with any download. Make sure that you have an updated antivirus program running at all times. And scan regularly. As far as trojan horses, download "The Cleaner" from www.moosoft.com. They have a 30 day free trial. Good luck.