Spyware is a software program that collects information about you such as browsing habits and preferences for websites you visit. This information is sent back through your Internet connection to a computer designated by the developer and dumped into a database. This information may then be sold to third parties such as advertisers or agencies.
Adware is a software program that will display pop up windows and/or banners as advertisements. They also come in the form of browser toolbars. These may be shown to you whether you are online or not.
These advertisements are not only annoying, but can consume a lot of your computer’s resources making it difficult to accomplish even the simplest of tasks.
Spyware and adware can infect your computer through a variety of channels. The most common infection seems to be through the downloading and installing of free software. Other means could be through email, instant messages, or even websites you visit.
If you are concerned that you may be infected with spyware or adware, the following lists five sure-fire signs that your computer is infected:
Pop-up ads
While many websites use pop-up ads that are built in to their website and not installed on your computer, some adware will use pop-ups as well. The pop-ups that are generated from spyware or adware are usually frequent, occur no matter which website you are visiting, and may even show adult-related content.
Changing of your homepage
Some adware and spyware programs will change your browser’s homepage to a website they want to direct you to. If this happens, and you try to change it back without success, you are infected.
Browser Redirection
Even if your homepage is not changed, there are other ways to get you to visit the website they want you to see. They can cause unexpected browser redirections (you are taken to a different website than you were trying to visit) and place Internet shortcuts on your desktop, usually to gaming, free software, or adult sites.
Browser Toolbars
Many reputable companies develop toolbars that attach to your Internet browser and provide useful tools to aid in your Internet usage - Google and Yahoo are two examples. But, there are also some not-so-reputable toolbar developers as well. If you have a new browser toolbar that you don’t know where it came from and you cannot get rid of it no matter how hard you try, then you are infected.
Severely Decreased Performance
If you have noticed a severe decrease in your computers performance lately, you may be infected. Spyware and adware programs are watching your every move and this eats up a lot of your computer’s resources. They may also be transmitting information about you back through your Internet connection that is hogging bandwidth and slowing your browsing down. Don’t think that your cable or DSL connection can handle this traffic. Nearly all broadband providers have much lower upload speeds than download speeds, which are never advertised.
If unexpected actions are taking place while using your computer, you may be infected with spyware or adware. By looking for certain behaviors, you can identify whether your computer is infected or not. If you are infected, it is time to find a good quality anti-spyware software package and clean up the damage.