How is spyware get into your computer ? In most cases, this occurs during the installation of the necessary and useful applications that a user installs on their own. There are , for example , free software that can be used only in conjunction with the built- spyware ; If a spy is removed, and the main program will be impossible to use . In addition, attention should be observed when installing programs : some spies get to your computer , for example, after a user , without hesitation, replied in the affirmative to any query that appeared on the screen during installation. Some developers are inserted in the distribution of their own products spyware , and a turn for help to businesses that create and deliver spyware software developers . Additionally, spyware can enter the computer from the Internet ( from such intrusions and protects the firewall). Currently there are several types of spyware. For example, many attackers are popular so-called keyloggers — keyloggers . Their characteristic feature is that they can have both software and hardware design. The main task of keylogger — collect and send your customer information on all keystrokes on the computer , followed by being watched . This is one of the most dangerous types of spyware , as it is able to steal confidential information entered via the keyboard : user names and passwords , PINs credit cards, confidential correspondence, etc. Often used keyloggers to steal software code generated software. If keylogger is hardware performance , then it is easy to detect . Just watch your computer , if the room where it is located, have access to the other person ( this is especially true with respect to the office computers ) . Take care to between keyboard and system unit does not appear for a device (typically a hardware keylogger is small, less than a matchbox ) and obscure detection devices immediately contact your system administrator . If the keylogger is a program , for its detection and neutralization using special software category AntiSpyware. Another well-known type of spyware — the scanner hard disk.