Spyware is one of the biggest threats

Spyware is one of the biggest threats to your privacy and the security of your data. It's also the number one cause of system slowdowns on computers because it uses precious system resources including RAM (memory) and hard drive space. Some Symptoms of Spyware, Adware, Malware Infection: The symptoms of a malware infection vary.
Spyware is one of the biggest threats to your privacy and the security of your data. It's also the number one cause of system slowdowns on computers because it uses precious system resources including RAM (memory) and hard drive space.

Malicious software may also shut down or disable your anti-virus program or your firewall program. It may prevent the normal activity of your anti-Spyware software. It may prevent you from accessing Task Manager or msconfig or regedit.
Adware programs may create new icons on the Windows desktop, task bar, or system tray. They may also create popup windows that you are unable to close. If your computer mysteriously dials the phone on its own, it may be infected with a porn dialing program.