Excel® 2013 On Demand

Avoiding Harmful Attacks

Spreading Harmful Infections

Many viruses and other harmful attacks spread through file downloads, attachments in e-mail messages, and data files that have macros, ActiveX controls, add-ins, or Visual Basic for Applications (VBA) code attached to them. Virus writers capitalize on people’s curiosity and willingness to accept files from people they know or work with, in order to transmit malicious files disguised as or attached to benign files. When you start downloading files to your computer, you must be aware of the potential for catching a computer virus, worm, or Trojan Horse. Typically, you can’t catch one from just reading a mail message or downloading a file, but you can catch one from installing, opening, or running ...