“While email attachments are a popular and convenient way to send documents, they are also a common source of viruses. Use caution when opening attachments, even if they appear to have been sent by someone you know.”
—Cyber Security Tip ST04-010

The above tip from the US Computer Emergency Readiness Team is a good one. In this day of computer viruses, scams, and spam, you can’t be too safe.

Learn how to protect yourself from email attachments by reading the complete tip at the US-CERT website.