Emily; if you Close the PREVIEW PANE of OE and do not open ANY messages that you are not sure of (espesially ones with attachments that you are not expecting) You should (i repeate "should") be safe. I read in one article that the KLEZ takes advantage of 4 holes in the MS HTML reader and can actually activate itself if the carrying message is previewd.....pretty scary but not overcomable (?is that a word?) just do not use the Preview Pane and be carful what you open.... Incredimail also has a free version (?still?) and is a very fun prog too! Of course the free version has a little advertisement and not ALL features, but still fun!