The main goal of spyware is to collect data regarding the usage of a computer system. This includes Internet browsing habits emails bank account information, account details, information and other personal data that could be used by hackers for identity theft for identity theft. It could also redirect web searches, alter homepages for browsers and alter the settings of computer systems.

Users can stay clear of infections caused by spyware by avoiding free download software, applications, toolbars and add-ons that usually come with malware. They should read the terms of service and privacy policies of the websites before downloading software and avoid clicking on the links in pop-up windows. They should also select "no" when a pop-up window asks if they wish to run a particular program or complete a specific task.

Antispyware software is able to detect and eliminate spyware from a laptop or mobile phone, as well prevent it infecting other devices. Certain programs provide real-time security, which scans all network data and blocks attempts to install malicious code. They also block spyware from tracking an individual's online activities or recording keystrokes.

The primary drawback of spyware is that it could slow down a computer and use up a lot of Internet bandwidth as well as memory and processing power. It can also cause applications to crash, and can even make the device overheat. In addition, certain kinds of spyware can hide from antispyware programs and blend with the operating anatomy's data files.