- Trojan Horses get their name from Greek mythology and the fact that software may not always be what it appears. Trojan Horses install themselves on your computer by clicking on something that appears to be legitimate- a regular piece of software, an online game, or even antivirus software. Ironic, right? Clicking on a Trojan Horse will cause it to run, often erasing parts of your hard drive.
- Viruses are computer scripts that are often attached to email attachments. They run silently in the background and often create, move, or erase files. They are also memory hogs that can slow the speed of your computer, making it impossible to multitask.
- Worms are invisible files that make their way through the memory on your machine, multiplying as they go. As worms multiply, they occupy more and more of your computer’s memory and space on your hard drive. They are a form of computer virus that makes your machine sluggish.
- Spyware watches as you use your computer and works to capture usernames and passwords and credit card information. This information is often sent to spyware creators over the internet who use your data as a way to make money. Like worms and viruses, spyware often comes through email attachments.
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Original post by Tech Savvy Mama