Spyware is relatively new to the classification of malicious code since it has traditionally been considered harmless. Spyware was thought to be a legal method of packaging software and vendors have been concerned with the legal aspects of preventing spyware from running. Since the dangers of spyware to exploit your computer system have been recognized, many vendors have moved forward with the production of anti spyware solutions. These solutions are available with various degrees of accuracy in detecting and eliminating spyware. Variations exist in the time necessary to complete a computer system scan and the number and types of malicious code that may be detected. In the same manner that new spyware is evolving, vendors are also developing new methods and spyware definitions to combat spyware. Some anti spyware software, particularly free software and downloads, are only capable of detecting spyware. They are not able to delete spyware programs or to correct the effects of spyware, such as modifications to your operating system or web browser. To protect your computer system from spyware you need to install the newest anti spyware software. Older anti virus software does not provide protection against spyware. Spyware does not necessarily propagate as typical viruses do. However, spyware will degrade the performance of your system and provide methods for others to infect your system with viruses. The newest antivirus programs offer some type of protection against spyware and most web browsers, firewalls and ISPs provide free anti spyware software. Though anti spyware software is advertised as part of many security suites, it is your responsibility to ensure that any chosen anti virus software actually includes an anti spyware solution.