Extreme spyware like Rootkits and other advanced spyware have fundamentally changed the playing field in todays computer security. While it may seem to be common sense, many of the most widelyspread attacks have involved spyware and e-mail attachment virus. Often these packages come as "suites" including a firewallsoftware and Spyware scanner program. They scan and destroy spyware as it's found in the user's PCr. Regardless of the type of spyware, it can slow your PC to a crawl and needs to be removed from your computer. Spyware occurs when certain URLs run programs in the back ground of your computer while cleaning information from it. There is now a bill in the US Congress to make Spyware illegal. Antispyware tools will greatly assist in secure your privacy and restoring full PC functions that spyware may have taken over. In the web world it is vital for people to have a good spyware scan and removal tool because of the multitude of spyware, adware, Trojans and other malware constantly looking to attack your computer. Spyware can slow down your computer, and would have to be removed. There are tools available which include good Spyware removal software among other security measures the user can take to protect the computer from malicious attack such as Viruses, Spyware and Adware. Spyware not only covertly runs in the background and steals personal information of the user it is a potential security threat of which the extent of the damage cannot be determined.