Rootkits that hide malicious software from anti- and anti-spyware tools are growing in number and sophistication, and will pose an unprecedented risk to users by 2008, company McAfee said this week.

In the opening quarter of 2006, said McAfee in the first of a trilogy of reports on rootkits, its Avert Labs spotted more rootkit components in worms, Trojan horses, and spyware than in all of 2005. During the past three years, the use of rootkits in malicious code has soared by more than 600 percent.

Read more: Rootkits To Mask Most Malware By 2008