Just a quick word of caution to everyone this Halloween -- and the same goes for all holidays -- be leery of opening strange Halloween e-mail greetings. And if you want to send Halloween e-cards to friends, be cautious of which site you visit.
Internet security company AVG (which has free anti-virus software) says an estimated 500 million e-cards are sent a year. But pick the wrong site, and you could be getting spam, spyware, adware and other malicious content. Also, because of the holidays, you'll find more Halloween-themed spam or malware disguised as a message from a friend, because you are more likely to think it really is a holiday greeting and open it. But if you don't recognize the company and if you don't recognize who it is from, don't open it. If you do open it and still aren't sure, don't click on any links inside of the message and don't download any attachments.