Viruses and spyware usually show up on your computer one of two ways. Either they invade your system with a frontal assault like
Huns attacking Romans, or they sneak in a back door like a cat burglar.
Either way, once a virus or piece of spyware gets on your system, getting it off can rate harder than curing a severe case of trench foot!
Viruses, malicious programs designed to disrupt normal computing, and spyware, programs intended to literally "spy" on your activities, can enter your computer a number of ways.
Most commonly they enter your system through an email attachment, by sharing files with an infected computer by disk, as a "ride along" with a 3rd party program you install, or through a "back door" port in your computer.
Regardless of how they get on your system, once in place, they cause no end of headaches and frustration.
The following represent typical signs you may suffer from infection by a virus or piece of spyware.
Your computer starts acting oddly by doing things it never did previously.
Your modem starts trying to dial out to Internet without you initiating a surfing session.
You notice that files start disappearing, system stalls, runs slowly, or even crashes frequently.
Your computer takes progressively longer to boot up every time you start it or you notice that your available hard drive space has disappeared. Strange popup windows appear, even when you're not surfing web, or you delete a program and it "magically" reappears next time you boot system.
