Malware: A Basic Introduction

Malware, the shortened name of malicious software is any software that has an ulterior, unscrupulous, or dishonest motive. The effects of malware can be as harmless as simply being annoying and slightly slowing down your computer's performance, or as dangerous as attacking your computer and your important files or collecting private information from you, like credit card numbers and passwords.

There are two basic categories of malware, the "front door" and the "back door" intruders. Malware that tries to infect your computer through email and networks is known as front door intruders and can be detected and caught fairly easily by an antivirus program. The "back door" intruders are hidden and disguised software that is often bundled with another program or appears to be something helpful. Usually these are downloaded by users from the Internet. Back door malware cannot be detected by antivirus programs.