Close window Myth - U can get a computer virus just by opening an e-mail... Fact To get a virus u need to open an e-mail's attachment. However, opening the mail can still let Spam Corp know your address is active, (u'll need to turn on the image filter: see the Tips section). Opening any attachment from an unknown source is risky, and especially if u don't check it with anti-virus software 1st. Anti-virus software only works properly if it's updated every week, because new viruses are always on the loose.