What Is Spam, And How Does It Affect Your Computer?

Spam is unsolicited electronic mail containing advertising and offers that you don't want.  Usually, spam doesn't have any negative effect on your computer, but some spam messages contain logic bombs, viruses, or worms that self-copy and spread through your computer system when you open the message.  These can do anything from send a record of your keystrokes to a hacker, or completely destroy your computer's internal system.  Spam can also slow down your computer by sending large amounts of information at once to different places on your hard drive.