I recommend not using Outlook Express. If you are sent messages that have viruses attached to them, it will automatically open the viruses as it's downloading the message. And as of yet, it has no virus protection built in, so you are effectively really exposing your computer to risks of infection/corruption. I had to reformat my sister's computer because of some of the viruses that she got from using Outlook - not fun. Oh, and btw, it also bypasses any virus scanner that may be active at the time...