Viruses, Malware, and Spyware, Oh My! Spyware and malware are software that gets installed on your system without your consent or even your knowledge, causes major headaches, and costs precious computing cycles and resources. While these are almost never fundamentally harmful to the computer itself (outside of dragging its performance to a woeful crawl), they're more of a threat to you, the user. Spyware can log your actions on your machine, including the sites you visit, the e-mail you send, and send it to unscrupulous parties. While most of it is harmless, or at least however harmless you think meticulously tracking someone's internet usage is and reporting it to advertisers can be, it can be an ongoing nuisance and can severely hamper your enjoyment of your computer. For more information on Spyware, read Microsoft's article, "What is Spyware" : Link
Viruses take care of anything that spyware and malware don't, and it can damage your system, possibly even irreparably. They can corrupt your operating system installation, corrupt your data, and damage your hardware.
These two classes of software are responsible for 90% (arbitrary figure) of the computing problems I come across in my personal and work life. Spyware and Viruses are such a problem that many computer repair shops don't even have to actually do anything in particular to fix infected computers - they can run software and scripts that remove the harmful software from an afflicted machine..
I'm going to tell you something that just might blow your mind. You don't NEED subscription based spyware/malware/anti-virus software.
If that didn't blow your mind, then how about this - you don't NEED to spend money to protect yourself.
The guys at the computer store are going to try and sell you on software packages you don't need. Using a basic, free anti-virus program that runs in the background is a good way to keep your system safe from any virus. Here is a list of three popular free antivirus programs for your PC:
- Avast! Home Edition: Link
- AVG Free: Link
- AntiVir Personal Edition: Link
There are also a couple of free, good spyware removal programs:
- Ad Aware: Link
- Spybot Search and Destroy: Link
I recommend running Ad Aware AND Spybot; one program can miss spyware the other will detect. Note that these don't need to run on startup - just run scans with them periodically to make sure your system is safe.